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                                                 We’re racing!



We‟re racing!




                                   Main Menu   Section Start   1
Start Section
                      Start show
                                                           We’re racing!




Let‟s assume we‟ve started.                                  Wind
We‟re getting close to another boat.




                                             Main Menu   Section Start   2
Start Section
                      Start show
                                                           We’re racing!




Let‟s assume we‟ve started.                                  Wind
We‟re getting close to another boat.
If one of us doesn‟t do
something, we‟ll collide.




                                             Main Menu   Section Start   3
Start Section
                       Start show
                                                              We’re racing!




Let‟s assume we‟ve started.                                     Wind
We‟re getting close to another boat.
If one of us doesn‟t do
something, we‟ll collide.




Let‟s invent a rule: “Every boat shall avoid contact with every other boat”.


                                               Main Menu    Section Start   4
Start Section
                       Start show
                                                              We’re racing!




Let‟s assume we‟ve started.                                     Wind
We‟re getting close to another boat.
If one of us doesn‟t do something,
we‟ll collide.



                                              Kerrunch!




Let‟s invent a rule: “Every boat shall avoid contact with every other boat”.


                                               Main Menu    Section Start   5
Start Section
                       Start show
                                                              We’re racing!




Let‟s assume we‟ve started.                                     Wind
We‟re getting close to another boat.
If one of us doesn‟t do
something, we‟ll collide.



                                              Kerrunch!




Let‟s invent a rule: “Every boat shall avoid contact with every other boat”.
Perhaps that’s not going to work…so we need some better rules.

                                               Main Menu    Section Start   6
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                                                             We’re racing!




Safety when two boats meet
• One of them must keep clear

•   The other has right of way, but her freedom to manoeuvre is
    restricted

•   But if the keep-clear boat does not avoid contact, the right-of-way
    boat must try to do so

•   Applies to both
    • the Racing Rules of Sailing (RRS) and …
    • the International Regulations for Preventing Collisions at Sea
        (IRPCAS)


                                               Main Menu   Section Start   7
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                                                          We’re racing!




When boats meet – it has to be easy for both to know which one
must keep clear. Just three criteria:

1. Which tack is each boat on?
2. Are they on the same tack or on opposite tacks?
3. Are they overlapped?


                          Italics
                          mean
                             a
                         define
                         d word
                         or term

                                            Main Menu   Section Start   8
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                                                             We’re racing!




How do you decide which tack a boat is on?

Tack is a defined term


Tack, Starboard or Port
A boat is on the tack, starboard or port, corresponding to her
windward side.

Leeward and Windward
A boat‟s leeward side is the side that is or, when she is head to
wind, was away from the wind. However, when sailing by the lee
or directly downwind, her leeward side is the side on which her
mainsail lies. The other side is her windward side…



                                              Main Menu    Section Start   9
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?




W - windward
L - leeward

                                              Main Menu     Section Start   10
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?
And so which tack is she on?




                                 W

                                     L




W - windward
L - leeward

                                              Main Menu     Section Start   11
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?
And so which tack is she on?




                                 W
                                         Port
                                     L




W - windward
L - leeward

                                                Main Menu   Section Start   12
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?




                                 W
                                         Port
                                     L




W - windward
L - leeward

                                                Main Menu   Section Start   13
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?
And so which tack is she on?


       Head to wind                  W          L
        but still on
        same tack                W
                                         Port
                                     L




W - windward
L - leeward

                                                    Main Menu   Section Start   14
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?
And so which tack is she on?


                                     W          L
                                          Port
                                 W
                                         Port
                                     L




W - windward
L - leeward

                                                    Main Menu   Section Start   15
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?


                                     W          L
                                          Port
                                 W
                                         Port
                                     L




W - windward
L - leeward

                                                    Main Menu   Section Start   16
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
And so which tack is she on?
                                                         L
                                     W          L
                                          Port
                                 W
                                         Port
                                     L




W - windward
L - leeward

                                                    Main Menu   Section Start   17
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
And so which tack is she on?
                                                         L
                                     W          L
                                          Port
                                 W
                                         Port
                                     L




W - windward
L - leeward

                                                    Main Menu   Section Start   18
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
                                                         L
                                     W          L
                                          Port
                                 W
                                         Port
                                     L




W - windward
L - leeward

                                                    Main Menu   Section Start   19
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
And so which tack is she on?
                                                         L
                                     W          L               L         W
                                          Port
                                 W
                                         Port
                                     L




W - windward
L - leeward

                                                    Main Menu       Section Start   20
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
And so which tack is she on?
                                                         L          Port
                                     W          L               L          W
                                          Port
                                 W
                                         Port
                                     L




W - windward
L - leeward

                                                    Main Menu        Section Start   21
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
                                                         L          Port
                                     W          L               L          W
                                          Port
                                 W
                                         Port
                                     L




W - windward
L - leeward

                                                    Main Menu        Section Start   22
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
And so which tack is she on?
                                                         L          Port
                                     W          L               L                 By the
                                                                           W
                                                                                 lee, but
                                          Port
                                 W                                                still on
                                         Port                                        the
                                     L                          L                  same
                                                                        W           tack




W - windward
L - leeward

                                                    Main Menu        Section Start      23
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
And so which tack is she on?
                                                         L          Port
                                     W          L               L          W
                                          Port
                                 W
                                         Port                       Port
                                     L                          L
                                                                        W




W - windward
L - leeward

                                                    Main Menu        Section Start   24
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
                                                         L          Port
                                     W          L               L          W
                                          Port
                                 W
                                         Port                       Port
                                     L                          L
                                                                        W




W - windward
L - leeward

                                                    Main Menu        Section Start   25
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
And so which tack is she on?
                                                         L           Port
                                     W          L                L             W
                                          Port
                                 W
                                         Port                            Port
                                     L                           L
                                                                            W

                                                             W
                                                                     L
W - windward
L - leeward

                                                    Main Menu            Section Start   26
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
And so which tack is she on?
                                                         L           Port
                                     W          L                L             W
                                          Port
                                 W
                                         Port                            Port
                                     L                           L
                                                                            W

                                                             W       Starboard
                                                                     L
W - windward
L - leeward

                                                    Main Menu            Section Start   27
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
                                                         L           Port
                                     W          L                L             W
                                          Port
                                 W
                                         Port                            Port
                                     L                           L
                                                                            W

                                                             W       Starboard
                                                                     L
W - windward
L - leeward

                                                    Main Menu            Section Start   28
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
And so which tack is she on?
                                                         L           Port
                                     W          L                L             W
                                          Port
                                 W
                                         Port                            Port
                                     L                           L
                                                                            W

                                                             W       Starboard
                                           W                         L
W - windward
L - leeward                                L
                                                    Main Menu            Section Start   29
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
And so which tack is she on?
                                                         L           Port
                                     W          L                L             W
                                          Port
                                 W
                                         Port                            Port
                                     L                           L
                                                                            W

                                                             W       Starboard
                                           W                         L
W - windward
                                                 Starboard
L - leeward                                L
                                                    Main Menu            Section Start   30
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                       W
                                                Port
                                                         L           Port
                                     W          L                L             W
                                          Port
                                 W
                                         Port                            Port
                                     L                           L
                                                                            W

                                                             W       Starboard
                                           W                         L
W - windward
                                                 Starboard
L - leeward                                L
                                                    Main Menu            Section Start   31
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                         W
                                                  Port
And so which tack is she on?
                                                           L           Port
                                       W          L                L             W
                                            Port
                                   W
                                           Port                            Port
                                       L                           L
                                                                              W
       Head to wind
        but still on           L   W                                   Starboard
        same tack                                              W
                                             W                         L
W - windward
                                                   Starboard
L - leeward                                  L
                                                      Main Menu            Section Start   32
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                         W
                                                  Port
And so which tack is she on?
                                                           L           Port
                                       W          L                L             W
                                            Port
                                   W
                                           Port                            Port
                                       L                           L
                                                                              W
                               L   W                                   Starboard
                                                               W
                           Starboard         W                         L
W - windward
                                                   Starboard
L - leeward                                  L
                                                      Main Menu            Section Start   33
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                         W
                                                  Port
And so which tack is she on?
                                                           L           Port
       Head to wind                    W          L                L             W
        but still on
                                            Port
        same tack                  W
                                           Port                            Port
                                       L                           L
                                                                              W
                               L   W                                   Starboard
                                                               W
                           Starboard         W                         L
W - windward
                                                   Starboard
L - leeward                                  L
                                                      Main Menu            Section Start   34
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                         W
                                                  Port
And so which tack is she on?
                                                           L           Port
       Head to wind                    W          L                L                    By the
                                                                                 W
        but still on                                                                   lee, but
                                            Port
        same tack                  W                                                    still on
                                           Port                            Port            the
                                       L                           L                     same
                                                                              W           tack

                               L   W                                   Starboard
                                                               W
                           Starboard         W                         L
W - windward
                                                   Starboard
L - leeward                                  L
                                                      Main Menu            Section Start      35
We’re racing!
              Definitions, Leeward and Windward, and Tack, Starboard or Port



Which are the windward and leeward
sides of the boat?                                         W
                                                  Port
And so which tack is she on?
                                                           L           Port
       Head to wind                    W          L                L                    By the
                                                                                 W
        but still on                                                                   lee, but
                                            Port
        same tack                  W                                                    still on
                                           Port                            Port            the
                                       L                           L                     same
                                                                              W           tack
       Head to wind
        but still on           L   W                                   Starboard
        same tack                                              W
                           Starboard         W                         L
W - windward
                                                   Starboard
L - leeward                                  L
                                                      Main Menu            Section Start      36
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When boats meet – it has to be easy for both to know which one
must keep clear. Just three criteria:
1. Which tack is each boat on?
2. Are they on the same tack or on opposite tacks?
3. Are they overlapped?
Clear Astern and Clear Ahead; Overlap
One boat is clear astern of another when her hull and equipment
in normal position are behind a line abeam from the aftermost
point of the other boat‟s hull and equipment in normal position.
The other boat is clear ahead. They overlap when neither is clear
astern. However, they also overlap when a boat between them
overlaps both. These terms always apply to boats on the same
tack. They do not apply to boats on opposite tacks unlesss rule 18
applies or both boats are sailing more than ninety degrees from
the true wind.

                                             Main Menu   Section Start   37
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                        Definition, Clear Astern and Clear Ahead; Overlap



Is one of these same-tack boats clear astern of the other?




 Clear
 astern




          Clear
          ahead


                                           Main Menu     Section Start   38
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                          Definition, Clear Astern and Clear Ahead; Overlap



Is one of these same-tack boats clear astern of the other?

YES – All of Blue is behind Yellow‟s „transom line.
So they are not overlapped
 Clear
 astern




           Clear
           ahead


                                             Main Menu     Section Start   39
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                         Definition, Clear Astern and Clear Ahead; Overlap



Is one of these same-tack boats still clear astern of the other?




 Clear
 astern




          Clear
          ahead


                                            Main Menu     Section Start   40
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                          Definition, Clear Astern and Clear Ahead; Overlap



Is one of these same-tack boats still clear astern of the other?
No, some of Blue is ahead of Yellow‟s „transom line‟.
So they are overlapped.
 Clear
 astern




          Clear
          ahead


                                             Main Menu     Section Start   41
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                          Definition, Clear Astern and Clear Ahead; Overlap



Is one of these same-tack boats still clear astern of the other?
No, some of Blue is ahead of Yellow‟s „transom line‟.
So they are overlapped.
 Clear
 astern

                                                  Technically, a line
                           Overlapped              abeam from the
                                                  aftermost point of
                                                       hull AND
                                                  equipment, which
          Clear
                                                    would include a
          ahead
                                                  transom-mounted
                                                        rudder.
                                             Main Menu      Section Start   42
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                        Definition, Clear Astern and Clear Ahead; Overlap



Is one of these same-tack boats clear astern of the other?




 Clear
 astern



                         Overlapped



          Clear
          ahead


                                           Main Menu     Section Start   43
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                                Definition, Clear Astern and Clear Ahead; Overlap



Is one of these same-tack boats clear astern of the other?
No, some of Yellow is ahead of Blue‟s „transom line‟.
So they are still overlapped.

 Clear
 astern



                                Overlapped       Overlapped



            Clear
            ahead


                                                   Main Menu     Section Start   44
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                        Definition, Clear Astern and Clear Ahead; Overlap



Is one of these same-tack boats clear astern of the other?




 Clear                                                          Clear
 astern                                                         ahead



                         Overlapped      Overlapped



          Clear                                          Clear
          ahead                                          astern


                                           Main Menu     Section Start   45
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                           Definition, Clear Astern and Clear Ahead; Overlap



Is one of these same-tack boats clear astern of the other?
Yes, all of Yellow is now clear astern of Blue‟s „transom line‟.
The overlap has ended.
 Clear                                                              Clear
 astern                                                             ahead



                            Overlapped      Overlapped



           Clear                                             Clear
           ahead                                             astern


                                              Main Menu      Section Start   46
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                     Definition, Clear Astern and Clear Ahead; Overlap




Clear
astern




         Clear
         ahead


                                        Main Menu     Section Start   47
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                     Definition, Clear Astern and Clear Ahead; Overlap




Clear
            Overlapped
astern




         Clear
                    Overlapped
         ahead


                                        Main Menu     Section Start   48
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                     Definition, Clear Astern and Clear Ahead; Overlap




Clear
            Overlapped           Overlapped
astern




         Clear
                    Overlapped           Overlapped
         ahead


                                        Main Menu     Section Start   49
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                     Definition, Clear Astern and Clear Ahead; Overlap




Clear                                                 Clear
            Overlapped           Overlapped
astern                                                astern




         Clear
                    Overlapped           Overlapped Clear
         ahead                                      ahead


                                        Main Menu     Section Start   50
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                           Definition, Clear Astern and Clear Ahead; Overlap


One boat is clear astern of another when her hull and equipment in
normal position are behind a line abeam from the aftermost point of
the other boat‟s hull and equipment in normal position. The other
boat is clear ahead.

Equipment that is NOT in its normal position cannot create an
overlap. For example:
• a spinnaker allowed to fly forwards by freeing its halyard
• a retractable „sprit‟ that is extended when there is no immediate
intention of setting a gennaker

If a boat astern with such equipment in an abnormal position is
catching the boat ahead, then:
• No overlap until the first piece of hull, or equipment in normal
position (such as the spinnaker pole) crosses the transom line
• and so ( in the case of the spinnaker) the overlap will happen later
than if the equipment had been in its normal position
                                              Main Menu     Section Start   51
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                           Definition, Clear Astern and Clear Ahead; Overlap


One boat is clear astern of another when her hull and equipment in
normal position are behind a line abeam from the aftermost point of
the other boat‟s hull and equipment in normal position. The other
boat is clear ahead.

Equipment that is NOT in its normal position cannot create an
overlap. For example:
• a spinnaker allowed to fly forwards by freeing its halyard
• a retractable „sprit‟ that is extended when there is no immediate
intention of setting a gennaker

Similarly:
• a „spinnaker-only‟ overlap will end if the spinnaker halyard is eased
to make the sail fly forwards
• a „sprit-only‟ overlap will end if the gennaker is removed but the
sprit is left extended if that is not its normal position at that time

                                              Main Menu     Section Start   52
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                          Definition, Clear Astern and Clear Ahead; Overlap



Is any part of Yellow behind Blue‟s „transom line‟?
Is any part of Blue behind Yellow‟s „transom line?‟




                                             Main Menu     Section Start   53
Start show                               We’re racing!
                          Definition, Clear Astern and Clear Ahead; Overlap



Is any part of Yellow behind Blue‟s „transom line‟?
Is any part of Blue behind Yellow‟s „transom line‟?
No – so neither is clear astern, so they are overlapped




                                             Main Menu     Section Start   54
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                          Definition, Clear Astern and Clear Ahead; Overlap



Is any part of Yellow behind Blue‟s „transom line‟?
Is any part of Blue behind Yellow‟s transom line?




                                             Main Menu     Section Start   55
Start show                               We’re racing!
                          Definition, Clear Astern and Clear Ahead; Overlap



Is any part of Yellow behind Blue‟s „transom line‟?
Is any part of Blue behind Yellow‟s transom line?
No – so neither is clear astern, so they are overlapped




                                             Main Menu     Section Start   56
Start show                               We’re racing!
                          Definition, Clear Astern and Clear Ahead; Overlap



Is any part of Yellow behind Blue‟s „transom line‟?
Is any part of Blue behind Yellow‟s transom line?




                                             Main Menu     Section Start   57
Start show                               We’re racing!
                             Definition, Clear Astern and Clear Ahead; Overlap



   Is any part of Yellow behind Blue‟s „transom line‟?
   Is any part of Blue behind Yellow‟s transom line?
   No – so neither is clear astern, so they are overlapped




Each pair is on the same tack, and the term overlap „always
applies to boats on the same tack.‟ (Definition Overlap)
                                                Main Menu     Section Start   58
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                          Definition, Clear Astern and Clear Ahead; Overlap



Are Yellow and Blue overlapped?




No. The term does not apply to opposite tack boats sailing to
windward and away from marks

                                             Main Menu     Section Start   59
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                       Definition, Clear Astern and Clear Ahead; Overlap



Are Yellow and Blue overlapped?




                                          Main Menu     Section Start   60
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                          Definition, Clear Astern and Clear Ahead; Overlap



Are Yellow and Blue overlapped?




Technically YES, because the definition Overlap says that the term
applies to boats sailing more than ninety degrees from the wind.
However, in open water, this fact has no further significance in the
rules. BLUE on port must keep clear of YELLOW on starboard.

                                             Main Menu     Section Start   61
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                       Definition, Clear Astern and Clear Ahead; Overlap



Are Yellow and Blue overlapped?




                                          Main Menu     Section Start   62
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                       Definition, Clear Astern and Clear Ahead; Overlap



Are Yellow and Blue overlapped?               Yes, even though they are
                                              on opposite tacks, both
                                              because rule 18, Mark-
                                              Room, applies, and also
                                              because they are both
                                              sailing more than ninety
                                              degrees from the true
                                              wind.
                                              In this case, BLUE on port
                                              still has to keep clear of
                                              YELLOW on starboard,
                                              but rule 18 puts a
                                              limitation on YELLOW,
                                              which will have to give
                                              mark-room.

                                          Main Menu     Section Start   63
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                          Definition, Clear Astern and Clear Ahead; Overlap



Is Blue clear ahead of Yellow?
IS Yellow clear astern of Blue?
The terms Clear Astern and Clear
Ahead do not apply to boats on
opposite tacks away from marks
and obstructions.
This situation is resolved by rule
10 that deals with opposite-tack
boats, and not by rule 12 that
deals with same-tack boats where
one is clear astern of the other.




                                             Main Menu     Section Start   64
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                           Definition, Clear Astern and Clear Ahead; Overlap



Is Blue clear ahead of Yellow?
IS Yellow clear astern of Blue?
YES. The terms Clear Astern and
Clear Ahead apply to opposite-tack
boats when rule 18 applies, or when
both boats are sailing more than
ninety degrees from the wind.
Both of these criteria make this a
clear-ahead / clear-astern situation.
As we will see, BLUE on port still
has to keep clear of YELLOW on
starboard, but rule 18 requires
clear-astern YELLOW to give mark-
room to clear-ahead BLUE

                                              Main Menu     Section Start   65
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                                             Italics mean a
                                            defined word or
Three Main Rules                                   term

When boats are on opposite tacks, a port-tack boat shall keep clear of
a starboard-tack boat. (Rule 10)
When boats are on the same tack and overlapped, a windward boat
shall keep clear of a leeward boat. (Rule 11)
When boats are on the same tack, and NOT overlapped, a boat clear
astern shall keep clear of a boat clear ahead. (Rule 12)

Keep Clear
One boat keeps clear of another if the other can sail her course with
no need to take avoiding action and, when the boats are overlapped
on the same tack, if the leeward boat can change course in both
directions without immediately making contact with the windward
boat.
                                              Main Menu       Section Start   66
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                                                           Definition, Keep Clear


Is RED keeping clear of GREEN?
What is the test for rule 10?
When boats are on opposite
tacks, the test is whether GREEN, the
starboard-tack right-of-way boat, „can
sail her course with no need to take
avoiding action‟.
Can you make that judgement from
this diagram?

FACTORS
• Wind and weather
• Size and manoeuvrability of the boats
• Speed of boats, and are speeds different?
• Eye contact between helms
• Hail from RED that she will duck – and a duck!
                                               Main Menu        Section Start   67
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                                                           Definition, Keep Clear

Is RED keeping clear of GREEN?
What is the test for rule 10?
When boats are on opposite
tacks, the test is whether GREEN, the
starboard-tack right-of-way boat, „can
sail her course with no need to take
avoiding action‟.
Can you make that judgement from
this diagram?

FACTORS
• Wind and weather
• Size and manoeuvrability of the boats
• Speed of boats, and are speeds different?


                                               Main Menu        Section Start   68
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                                                        Definition, Keep Clear


Is BLUE keeping clear of YELLOW?
What is the test for rule 12?
When boats are on the same tack but not
overlapped, the test is still whether
YELLOW, the right-of-way boat, can „sail her
course with no need to take avoiding action.‟
Can you make that judgement from this
diagram?

FACTORS
•Wind and weather
•Size and manoeuvrability of the boats
• Is BLUE closing on YELLOW?



                                            Main Menu        Section Start   69
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                                                        Definition, Keep Clear



In all these cases – opposite tacks, or
same tack, not overlapped - the test is
whether the right-of-way boat, can „sail
her course with no need to take avoiding
action‟.
So it‟s not just a question of what the
keep-clear boat is doing.
Rather, it‟s the effect of the keep-clear
boat‟s actions on the right-of-way boat.




                                            Main Menu        Section Start   70
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                                                          Definition, Keep Clear


Is BLUE keeping clear of YELLOW?
What is the test?
The test is first whether YELLOW, the right-of-way boat, can sail her course
with no need to take avoiding action.
If their courses are parallel, even if BLUE is close, YELLOW can sail her
course.




       Is BLUE keeping
            clear?




                                              Main Menu        Section Start   71
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                                                          Definition, Keep Clear


Is BLUE keeping clear of YELLOW?
What is the test?
The test is first whether YELLOW, the right-of-way boat, can sail her course
with no need to take avoiding action.
If their courses are parallel, even if BLUE is close, YELLOW can sail her
course.
But as they are overlapped on the same tack, the test is secondly whether
the leeward boat can change course (hypothetically) in BOTH directions
without immediate contact.

       Is BLUE keeping
            clear?




                                              Main Menu        Section Start   72
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                                                             Definition, Keep Clear


Is BLUE keeping clear of YELLOW?
What is the test?
…the test is secondly whether the leeward boat can change course
(hypothetically) in BOTH directions without immediate contact.
If YELLOW were to luff, there may be contact, but probably not
immediately. So BLUE passed that part of the test.




       Is BLUE keeping          Suppose a luff
            clear?               by YELLOW




                                                 Main Menu        Section Start   73
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                                                             Definition, Keep Clear


Is BLUE keeping clear of YELLOW?
What is the test?
…the test is secondly whether the leeward boat can change course
(hypothetically) in BOTH directions without immediate contact.
If YELLOW were to luff, there may be contact, but probably not
immediately. So BLUE passed that part of the test.
But if YELLOW were to bear away, and there would be contact, it is more
likely to be immediate. If that‟s what a protest committee thinks, then BLUE
was not initially keeping clear.
       Is BLUE keeping          Suppose a luff         Suppose a bear-
            clear?               by YELLOW            away by YELLOW




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Rule 10 - On Opposite Tacks

When boats are on opposite
tacks, a port-tack boat shall keep
clear of a starboard tack boat.




Which boat would you prefer to be?

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Rule 10 - On Opposite Tacks

When boats are on opposite
tacks, a port-tack boat shall keep
clear of a starboard tack boat.




Which boat would you prefer to be?

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Rule 10 - On Opposite Tacks

When boats are on opposite
tacks, a port-tack boat shall keep
clear of a starboard tack boat.




Which boat would you prefer to be?

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Rule 10 - On Opposite Tacks

When boats are on opposite
tacks, a port-tack boat shall keep
clear of a starboard tack boat.




Which boat would you prefer to be?

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Rule 10 - On Opposite Tacks

When boats are on opposite
tacks, a port-tack boat shall keep
clear of a starboard tack boat.




Which boat would you prefer to be?

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Rule 11 - On the Same Tack, Overlapped

When boats are on the same tack and
overlapped, a windward boat shall keep clear
of a leeward boat.




                                            Main Menu   Section Start   80
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SPOT THE DIFFERENCE




                                  Main Menu   Section Start   81
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Rule 12 - On the Same
Tack, Not Overlapped

When boats are on the same
tack, and NOT overlapped, a
boat clear astern shall keep
clear of a boat clear ahead.




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Rule 13 - While Tacking
After a boat passes head to wind, she shall keep clear of other
boats until she is on a close-hauled course. During that time rules
10, 11 and 12 do not apply. If two boats are subject to this rule at
the same time, the one on the other‟s port side or the one astern
shall keep clear.

„Tacking‟ is not a defined. The word in the rule title is used in its
general sense of going from one tack to the other.
However, the words of the rule itself apply to only a part of this
action, from when a boat passes head to wind until she is on a
close-hauled course. Her sails need not be full at that moment.
During that time, a boat shall keep clear of other boats. The
previous three rules (10, 11, 12) don‟t apply at that time.
A tacking boat is always on one tack or the other. The tack changes
when passing head to wind.
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So Rule 13 suspends the three main rules when a boat has passed
head to wind but is not yet on a close-hauled course




                                  YELLOW has right of way under rule 10
    BLUE must keep clear
                                         (port and starboard)


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So Rule 13 suspends the three main rules when a boat has passed
head to wind but is not yet on a close-hauled course




BLUE must keep clear                YELLOW still has right of way under rule 10
                                             (port and starboard)


                                    YELLOW has right of way under rule 10
     BLUE must keep clear
                                           (port and starboard)


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So Rule 13 suspends the three main rules when a boat has passed
head to wind but is not yet on a close-hauled course




      BLUE temporarily has           YELLOW has passed head to wind and
      right of way                      must now keep clear of BLUE
BLUE must keep clear                YELLOW still has right of way under rule 10
                                             (port and starboard)


                                    YELLOW has right of way under rule 10
     BLUE must keep clear
                                           (port and starboard)


                                                 Main Menu      Section Start     86
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So Rule 13 suspends the three main rules when a boat has passed
head to wind but is not yet on a close-hauled course


                                       YELLOW has reached a close-hauled
                                        course and so has regained right of
        BLUE must keep clear            way, under rule 11, (windward and
                                                    leeward)
      BLUE temporarily has           YELLOW has passed head to wind and
      right of way                      must now keep clear of BLUE
BLUE must keep clear                YELLOW still has right of way under rule 10
                                             (port and starboard)


                                    YELLOW has right of way under rule 10
     BLUE must keep clear
                                           (port and starboard)


                                                 Main Menu      Section Start     87
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Two boats that have
passed head to wind
but are neither yet
close-hauled




                                   YELLOW                     BLUE
                                   has right                must keep
                                    of way                    clear
                                     under                  under rule
                                    rule 10                    10


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Two boats that have
passed head to wind
but are neither yet
close-hauled




                                   YELLOW                     BLUE
                                   has right                must keep
                                    of way                    clear
                                     under                  under rule
                                    rule 10                    10


                                               Main Menu   Section Start   89
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Two boats that have
passed head to wind                                          BLUE
but are neither yet                 YELLOW
                                                           has right
close-hauled                        must keep
                                                            of way
                                      clear
                                                             under
                                    under rule
                                                            rule 13
                                       13

                                   YELLOW                     BLUE
                                   has right                must keep
                                    of way                    clear
                                     under                  under rule
                                    rule 10                    10


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Rule 14 - Avoiding Contact
A boat shall avoid contact with another boat if reasonably possible.
However, a right-of-way boat or one entitled to room or mark-room
   (a) need not act to avoid contact until it is clear that the other
        boat is not keeping clear or giving room or mark-room, and
   (b) shall not be penalized under this rule unless there is contact
        that causes damage or injury.


Keeping clear is more than just avoiding contact. So this rule does not
add to the requirements of a keep-clear boat
Despite the first line of the rule, it‟s safer and fairer for a right-of-way
boat to „stand on‟ until it is clear that the keep-clear boat isn‟t doing so
Even if a right-of-way or room-entitled boat wrongfully allows a collision
to happen, she will be penalized only when damage or injury results
So a right-of-way boat or one entitled to room or mark-room can break
the first line of this rule - at her own risk
                                                 Main Menu    Section Start    91
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Rule 15 - Acquiring Right of Way

When a boat acquires right-of-way, she shall initially give the other boat
room to keep clear….




    Keep clear,
    clear astern                       1
                   1                              Right of way,
                                                  clear ahead


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Rule 15 - Acquiring Right of Way

When a boat acquires right-of-way, she shall initially give the other boat
room to keep clear….




          Keep clear,
          clear astern                            2
    Keep clear,               2                               Right of way,
    clear astern                          1                   clear ahead
                         1                            Right of way,
                                                      clear ahead


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Rule 15 - Acquiring Right of Way

When a boat acquires right-of-way, she shall initially give the other boat
room to keep clear….




                   Keep clear,
                    windward
                                                       3          Right of way,
          Keep clear,                                               leeward
                                     3
          clear astern                             2
    Keep clear,                  2                               Right of way,
    clear astern                          1                      clear ahead
                         1                                 Right of way,
                                                           clear ahead


                                                    Main Menu              Section Start   94
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Rule 15 - Acquiring Right of Way

When a boat acquires right-of-way, she shall initially give the other boat
room to keep clear….


                                                                       Keep clear,
                       Right of way
                                                                      beyond head
                   Keep clear,                       4                   to wind
                    windward              4                  3          Right of way,
          Keep clear,                                                     leeward
                                      3
          clear astern                                   2
    Keep clear,                  2                                     Right of way,
    clear astern                              1                        clear ahead
                         1                                       Right of way,
                                                                 clear ahead


                                                         Main Menu               Section Start   95
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Rule 15 - Acquiring Right of Way

When a boat acquires right-of-way, she shall initially give the other boat
room to keep clear….
                                                                  Right of way,
                                 Keep clear,
                                                                   starboard
                                  port tack
                                                       5                        Keep clear,
                       Right of way
                                                                               beyond head
                                                   5
                   Keep clear,                                4                   to wind
                    windward                   4                      3          Right of way,
          Keep clear,                                                              leeward
                                       3
          clear astern                                            2
    Keep clear,                   2                                             Right of way,
    clear astern                                       1                        clear ahead
                         1                                                Right of way,
                                                                          clear ahead


                                                                  Main Menu               Section Start   96
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Rule 15 - Acquiring Right of Way

When a boat acquires right-of-way, she shall initially give the other boat
room to keep clear… unless she acquires right of way because of
the other boat’s actions.




                                                                       Keep clear,
                                                   1                   clear astern
                              Right of way,                     1
                              clear ahead

                                                    Main Menu       Section Start     97
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Rule 15 - Acquiring Right of Way

When a boat acquires right-of-way, she shall initially give the other boat
room to keep clear… unless she acquires right of way because of
the other boat’s actions.




                                                                        Keep clear,
                                              2                         clear astern
                        Right of way,                         2               Keep clear,
                        clear ahead                    1                      clear astern
                              Right of way,                         1
                              clear ahead

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Rule 15 - Acquiring Right of Way

When a boat acquires right-of-way, she shall initially give the other boat
room to keep clear… unless she acquires right of way because of
the other boat’s actions.


                                                                       Keep clear,
                                                                        windward
                       Right of way,          3
                         leeward                                              Keep clear,
                                                               3
                                                  2                           clear astern
                        Right of way,                              2                 Keep clear,
                        clear ahead                        1                         clear astern
                              Right of way,                               1
                              clear ahead

                                                            Main Menu            Section Start      99
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Rule 15 - Acquiring Right of Way

When a boat acquires right-of-way, she shall initially give the other boat
room to keep clear… unless she acquires right of way because of
the other boat’s actions.
                          Keep clear,                                 Right of way
                         beyond head
                            to wind                   4                     Keep clear,
                                                          4                  windward
                       Right of way,          3
                         leeward                                                   Keep clear,
                                                                  3
                                                  2                                clear astern
                        Right of way,                                   2                 Keep clear,
                        clear ahead                           1                           clear astern
                              Right of way,                                    1
                              clear ahead

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Rule 16 - Changing Course

16.1 When a right-of-way boat changes course, she shall give the
other boat room to keep clear.




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Rule 16 - Changing Course

16.1 When a right-of-way boat changes course, she shall give the
other boat room to keep clear.

   • So the rate of any change of course by the right-of-way boat
     is limited by how close the other boat is, before and during
     the change of course

   • If the give-way boat responds promptly, and in a seamanlike
     way in the prevailing conditions, yet is unable to keep
     clear, the right-of-way boat has not given her room to keep
     clear

   • There is an exception when boats are rounding a mark, as
     we shall see later                  Main Menu    Section Start   102
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Rule 16 - Changing Course

16.1 When a right-of-way boat changes course, she shall give the
other boat room to keep clear.
16.2 In addition, when after the starting signal a port-tack boat is
keeping clear by sailing to pass astern of a starboard-tack boat, the
starboard-tack boat shall not change course if as a result the port-
tack boat would immediately need to change course to continue
keeping clear.




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Rule 16.2

Additional to rule 16.1
After the starting signal -
P is keeping clear -
by sailing to pass astern of S -




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Rule 16.2

Additional to rule 16.1
After the starting signal -
P is keeping clear -
by sailing to pass astern of S -    GREEN (S) will not break rule 16.1
                                    if RED (P) has room as defined to
which alters towards her -
                                    duck or tack to keep clear
and P now needs to change
course immediately to keep          But GREEN breaks rule 16.2 if RED
clear                               now needs to act immediately to
                                    keep clear
Rule 16.2 works in a narrow window – if GREEN changes course before it
applies, GREEN breaks no rule
But if GREEN changes course after it applies, GREEN breaks rule 16.1
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Rule 17                                              Rule 17

An overlap to leeward from clear
astern and within two lengths

                                                   Not Rule 17




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Rule 17                                     Rule 17
An overlap to leeward from clear
astern and within two lengths
While they remain on the same
tack and overlapped and…




                 Rule 17 over

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Rule 17                                                   L breaks rule 17


An overlap to leeward from clear
astern and within two lengths            L's proper
                                           course
While they remain on the same
tack and overlapped and…
are still within two of L‟s lengths…                  Rule 17 stops applying to L
L must not sail above her proper
course…


                                       L's proper
                                         course




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Rule 17                                          BLUE breaks rule 17

An overlap to leeward from clear
astern and within two lengths          L's proper
                                        course
While they remain on the same
tack and overlapped and…
are still within two of L‟s lengths…                BLUE still breaks rule 17
                                                     even though she's not
L must not sail above her proper
                                                        near YELLOW
course…




                                       L's proper course


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Rule 17                                              BLUE IS BREAKING RULE
                                                              17...

An overlap to leeward from clear
astern and within two lengths




                                                                         L' cou
                                                                           s
                                                                             pr rse
                                                                               op
While they remain on the same




                                                                                 er
tack and overlapped and…
are still within two of L‟s lengths…
L must not sail above her proper       ...unless she promptly sails
                                              astern of yellow
course…
Unless she sails astern




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Rule 17                                                  4




                                                                         Ru YE
…This rule does not apply if the




                                                                           le
                                                             3




                                                                              13 LOW
overlap begins when the           4




                                                                                ap
                                                                                L
windward boat is required by rule




                                                                                   plie
13 to keep clear.




                                                                                        st
                                          3                          2




                                                                                          o
BLUE becomes overlapped while


                                   L' cou
                                                   2
YELLOW is between head to

                                     s
                                       pr rse
                                         op
wind and close hauled                                            1


                                           er
                                                             1
So here, rule 17 DOES NOT
restrict BLUE. She can luff
above a proper course at any
time during this overlap

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Rule 17                                             4




                                                                R
                                                                    ul YE
                                                        3
…This rule does not apply if the




                                                                      e
                                                                        13 LL
                                                                          ap OW
overlap begins while the




                                                                            pl
                                                                              ie
windward boat is required by rule




                                                                                s
                                                                                  to
                                    4
13 to keep clear.                                                   2

Here, that hasn‟t happened.                  3
When rule 13 stopped applying to                            1
YELLOW at position 3, BLUE had
not yet become overlapped. Only


                                          L' cou
                                            s
after that did the overlap begin.


                                              pr rse
                                                                2




                                                op
                                                   er
Rule 17 DOES apply, and BLUE
must not luff above a proper                                                 1
course after position 4.

                                          Main Menu             Section Start          112
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Test your Knowledge




Shortly before the starting signal, you in BLUE see YELLOW for the
 first time. YELLOW is head to wind. Which keeps clear of which?

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  Test your Knowledge




 It depends on which tack YELLOW is on. You need more information.
YELLOW is on the tack on which she approached the line and stopped.




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  Test your Knowledge




 It depends on which tack YELLOW is on. You need more information.
YELLOW is on the tack on which she approached the line and stopped.
            If she came in on port tack, she is still on port.
              Which keeps clear, and under which rule?
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  Test your Knowledge




 It depends on which tack YELLOW is on. You need more information.
YELLOW is on the tack on which she approached the line and stopped.
            If she came in on port tack, she is still on port.
          YELLOW keeps clear, rule 10 (port & starboard)
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  Test your Knowledge




 It depends on which tack YELLOW is on. You need more information.
YELLOW is on the tack on which she approached the line and stopped.
      If she came in on starboard tack, she is still on starboard.
              Which keeps clear, and under which rule?
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  Test your Knowledge




 It depends on which tack YELLOW is on. You need more information.
YELLOW is on the tack on which she approached the line and stopped.
      If she came in on starboard tack, she is still on starboard.
 Same tack, overlapped, windward (BLUE) keeps clear under rule 11
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Test your Knowledge




   For each YELLOW - BLUE pair, which keeps clear of which?

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Test your Knowledge



             P        S
             W        W              S               P




         P                S
                               P                         S
         L                L




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Test your Knowledge



             P        S
             W        W                S               P




         P                S
                                   P                       S
         L                L


      BLUE (11)   BLUE (11)    YELLOW (10) BLUE (10)
                  - are the keep clear boats

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Test your Knowledge

After start, RED will clear
GREEN, then a windshift lifts
GREEN and backs RED.
There is a protest.
RED‟s case:
GREEN broke rule 16.2
because I had to luff
immediately after her course
change.

GREEN‟s case.
Simple port / starboard – and I was entitled to take advantage of the
windshift.

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Test your Knowledge

Both are wrong.
Not rule 16.2, as RED was passing
ahead, not astern.
GREEN has to comply with rule 16.1,
even when being lifted on a shift.




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Test your Knowledge

Both are wrong.
Not rule 16.2, as RED was passing
ahead, not astern.
GREEN has to comply with rule
16.1, even when being lifted on a
shift.
When GREEN was lifted, RED now had to act to keep clear.
Did RED have room to keep clear by tacking promptly in a seamanlike
way in the prevailing conditions?
If so, GREEN did not break rule 16.1, and RED broke rule 10 (port and
starboard) by making the wrong decision and bearing away.
If not, then GREEN altered too close to RED and broke rule 16.1
It will all depend on the conditions.
                                              Main Menu   Section Start   124
GOING BY THE RULES




What’s cooking?
THE MAIN COURSE                                      STARTERS
Basically and Fundamentally…   What‟s new for 2009 – quick guide
We‟re racing!                     What‟s new for 2009 – in detail
We‟re starting!                                  INGREDIENTS
We‟re rounding!                              Reading the signals
We‟re taking turns!                    Major definitions in action
We‟re finishing!                     The Racing Rules of Sailing
We‟re unhappy!                                    The Definitions




                                                                     125

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Going by the Rules - We're racing

  • 1. Start Section Start show We’re racing! We‟re racing! Main Menu Section Start 1
  • 2. Start Section Start show We’re racing! Let‟s assume we‟ve started. Wind We‟re getting close to another boat. Main Menu Section Start 2
  • 3. Start Section Start show We’re racing! Let‟s assume we‟ve started. Wind We‟re getting close to another boat. If one of us doesn‟t do something, we‟ll collide. Main Menu Section Start 3
  • 4. Start Section Start show We’re racing! Let‟s assume we‟ve started. Wind We‟re getting close to another boat. If one of us doesn‟t do something, we‟ll collide. Let‟s invent a rule: “Every boat shall avoid contact with every other boat”. Main Menu Section Start 4
  • 5. Start Section Start show We’re racing! Let‟s assume we‟ve started. Wind We‟re getting close to another boat. If one of us doesn‟t do something, we‟ll collide. Kerrunch! Let‟s invent a rule: “Every boat shall avoid contact with every other boat”. Main Menu Section Start 5
  • 6. Start Section Start show We’re racing! Let‟s assume we‟ve started. Wind We‟re getting close to another boat. If one of us doesn‟t do something, we‟ll collide. Kerrunch! Let‟s invent a rule: “Every boat shall avoid contact with every other boat”. Perhaps that’s not going to work…so we need some better rules. Main Menu Section Start 6
  • 7. Start Section Start show We’re racing! Safety when two boats meet • One of them must keep clear • The other has right of way, but her freedom to manoeuvre is restricted • But if the keep-clear boat does not avoid contact, the right-of-way boat must try to do so • Applies to both • the Racing Rules of Sailing (RRS) and … • the International Regulations for Preventing Collisions at Sea (IRPCAS) Main Menu Section Start 7
  • 8. Start Section Start show We’re racing! When boats meet – it has to be easy for both to know which one must keep clear. Just three criteria: 1. Which tack is each boat on? 2. Are they on the same tack or on opposite tacks? 3. Are they overlapped? Italics mean a define d word or term Main Menu Section Start 8
  • 9. Start Section Start show We’re racing! How do you decide which tack a boat is on? Tack is a defined term Tack, Starboard or Port A boat is on the tack, starboard or port, corresponding to her windward side. Leeward and Windward A boat‟s leeward side is the side that is or, when she is head to wind, was away from the wind. However, when sailing by the lee or directly downwind, her leeward side is the side on which her mainsail lies. The other side is her windward side… Main Menu Section Start 9
  • 10. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W - windward L - leeward Main Menu Section Start 10
  • 11. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? And so which tack is she on? W L W - windward L - leeward Main Menu Section Start 11
  • 12. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? And so which tack is she on? W Port L W - windward L - leeward Main Menu Section Start 12
  • 13. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port L W - windward L - leeward Main Menu Section Start 13
  • 14. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? And so which tack is she on? Head to wind W L but still on same tack W Port L W - windward L - leeward Main Menu Section Start 14
  • 15. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? And so which tack is she on? W L Port W Port L W - windward L - leeward Main Menu Section Start 15
  • 16. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W L Port W Port L W - windward L - leeward Main Menu Section Start 16
  • 17. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W And so which tack is she on? L W L Port W Port L W - windward L - leeward Main Menu Section Start 17
  • 18. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L W L Port W Port L W - windward L - leeward Main Menu Section Start 18
  • 19. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port L W L Port W Port L W - windward L - leeward Main Menu Section Start 19
  • 20. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L W L L W Port W Port L W - windward L - leeward Main Menu Section Start 20
  • 21. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L Port W L L W Port W Port L W - windward L - leeward Main Menu Section Start 21
  • 22. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port L Port W L L W Port W Port L W - windward L - leeward Main Menu Section Start 22
  • 23. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L Port W L L By the W lee, but Port W still on Port the L L same W tack W - windward L - leeward Main Menu Section Start 23
  • 24. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L Port W L L W Port W Port Port L L W W - windward L - leeward Main Menu Section Start 24
  • 25. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port L Port W L L W Port W Port Port L L W W - windward L - leeward Main Menu Section Start 25
  • 26. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L Port W L L W Port W Port Port L L W W L W - windward L - leeward Main Menu Section Start 26
  • 27. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L Port W L L W Port W Port Port L L W W Starboard L W - windward L - leeward Main Menu Section Start 27
  • 28. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port L Port W L L W Port W Port Port L L W W Starboard L W - windward L - leeward Main Menu Section Start 28
  • 29. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L Port W L L W Port W Port Port L L W W Starboard W L W - windward L - leeward L Main Menu Section Start 29
  • 30. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L Port W L L W Port W Port Port L L W W Starboard W L W - windward Starboard L - leeward L Main Menu Section Start 30
  • 31. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port L Port W L L W Port W Port Port L L W W Starboard W L W - windward Starboard L - leeward L Main Menu Section Start 31
  • 32. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L Port W L L W Port W Port Port L L W Head to wind but still on L W Starboard same tack W W L W - windward Starboard L - leeward L Main Menu Section Start 32
  • 33. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L Port W L L W Port W Port Port L L W L W Starboard W Starboard W L W - windward Starboard L - leeward L Main Menu Section Start 33
  • 34. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L Port Head to wind W L L W but still on Port same tack W Port Port L L W L W Starboard W Starboard W L W - windward Starboard L - leeward L Main Menu Section Start 34
  • 35. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L Port Head to wind W L L By the W but still on lee, but Port same tack W still on Port Port the L L same W tack L W Starboard W Starboard W L W - windward Starboard L - leeward L Main Menu Section Start 35
  • 36. We’re racing! Definitions, Leeward and Windward, and Tack, Starboard or Port Which are the windward and leeward sides of the boat? W Port And so which tack is she on? L Port Head to wind W L L By the W but still on lee, but Port same tack W still on Port Port the L L same W tack Head to wind but still on L W Starboard same tack W Starboard W L W - windward Starboard L - leeward L Main Menu Section Start 36
  • 37. Start Section Start show We’re racing! When boats meet – it has to be easy for both to know which one must keep clear. Just three criteria: 1. Which tack is each boat on? 2. Are they on the same tack or on opposite tacks? 3. Are they overlapped? Clear Astern and Clear Ahead; Overlap One boat is clear astern of another when her hull and equipment in normal position are behind a line abeam from the aftermost point of the other boat‟s hull and equipment in normal position. The other boat is clear ahead. They overlap when neither is clear astern. However, they also overlap when a boat between them overlaps both. These terms always apply to boats on the same tack. They do not apply to boats on opposite tacks unlesss rule 18 applies or both boats are sailing more than ninety degrees from the true wind. Main Menu Section Start 37
  • 38. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is one of these same-tack boats clear astern of the other? Clear astern Clear ahead Main Menu Section Start 38
  • 39. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is one of these same-tack boats clear astern of the other? YES – All of Blue is behind Yellow‟s „transom line. So they are not overlapped Clear astern Clear ahead Main Menu Section Start 39
  • 40. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is one of these same-tack boats still clear astern of the other? Clear astern Clear ahead Main Menu Section Start 40
  • 41. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is one of these same-tack boats still clear astern of the other? No, some of Blue is ahead of Yellow‟s „transom line‟. So they are overlapped. Clear astern Clear ahead Main Menu Section Start 41
  • 42. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is one of these same-tack boats still clear astern of the other? No, some of Blue is ahead of Yellow‟s „transom line‟. So they are overlapped. Clear astern Technically, a line Overlapped abeam from the aftermost point of hull AND equipment, which Clear would include a ahead transom-mounted rudder. Main Menu Section Start 42
  • 43. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is one of these same-tack boats clear astern of the other? Clear astern Overlapped Clear ahead Main Menu Section Start 43
  • 44. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is one of these same-tack boats clear astern of the other? No, some of Yellow is ahead of Blue‟s „transom line‟. So they are still overlapped. Clear astern Overlapped Overlapped Clear ahead Main Menu Section Start 44
  • 45. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is one of these same-tack boats clear astern of the other? Clear Clear astern ahead Overlapped Overlapped Clear Clear ahead astern Main Menu Section Start 45
  • 46. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is one of these same-tack boats clear astern of the other? Yes, all of Yellow is now clear astern of Blue‟s „transom line‟. The overlap has ended. Clear Clear astern ahead Overlapped Overlapped Clear Clear ahead astern Main Menu Section Start 46
  • 47. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Clear astern Clear ahead Main Menu Section Start 47
  • 48. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Clear Overlapped astern Clear Overlapped ahead Main Menu Section Start 48
  • 49. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Clear Overlapped Overlapped astern Clear Overlapped Overlapped ahead Main Menu Section Start 49
  • 50. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Clear Clear Overlapped Overlapped astern astern Clear Overlapped Overlapped Clear ahead ahead Main Menu Section Start 50
  • 51. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap One boat is clear astern of another when her hull and equipment in normal position are behind a line abeam from the aftermost point of the other boat‟s hull and equipment in normal position. The other boat is clear ahead. Equipment that is NOT in its normal position cannot create an overlap. For example: • a spinnaker allowed to fly forwards by freeing its halyard • a retractable „sprit‟ that is extended when there is no immediate intention of setting a gennaker If a boat astern with such equipment in an abnormal position is catching the boat ahead, then: • No overlap until the first piece of hull, or equipment in normal position (such as the spinnaker pole) crosses the transom line • and so ( in the case of the spinnaker) the overlap will happen later than if the equipment had been in its normal position Main Menu Section Start 51
  • 52. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap One boat is clear astern of another when her hull and equipment in normal position are behind a line abeam from the aftermost point of the other boat‟s hull and equipment in normal position. The other boat is clear ahead. Equipment that is NOT in its normal position cannot create an overlap. For example: • a spinnaker allowed to fly forwards by freeing its halyard • a retractable „sprit‟ that is extended when there is no immediate intention of setting a gennaker Similarly: • a „spinnaker-only‟ overlap will end if the spinnaker halyard is eased to make the sail fly forwards • a „sprit-only‟ overlap will end if the gennaker is removed but the sprit is left extended if that is not its normal position at that time Main Menu Section Start 52
  • 53. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is any part of Yellow behind Blue‟s „transom line‟? Is any part of Blue behind Yellow‟s „transom line?‟ Main Menu Section Start 53
  • 54. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is any part of Yellow behind Blue‟s „transom line‟? Is any part of Blue behind Yellow‟s „transom line‟? No – so neither is clear astern, so they are overlapped Main Menu Section Start 54
  • 55. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is any part of Yellow behind Blue‟s „transom line‟? Is any part of Blue behind Yellow‟s transom line? Main Menu Section Start 55
  • 56. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is any part of Yellow behind Blue‟s „transom line‟? Is any part of Blue behind Yellow‟s transom line? No – so neither is clear astern, so they are overlapped Main Menu Section Start 56
  • 57. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is any part of Yellow behind Blue‟s „transom line‟? Is any part of Blue behind Yellow‟s transom line? Main Menu Section Start 57
  • 58. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is any part of Yellow behind Blue‟s „transom line‟? Is any part of Blue behind Yellow‟s transom line? No – so neither is clear astern, so they are overlapped Each pair is on the same tack, and the term overlap „always applies to boats on the same tack.‟ (Definition Overlap) Main Menu Section Start 58
  • 59. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Are Yellow and Blue overlapped? No. The term does not apply to opposite tack boats sailing to windward and away from marks Main Menu Section Start 59
  • 60. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Are Yellow and Blue overlapped? Main Menu Section Start 60
  • 61. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Are Yellow and Blue overlapped? Technically YES, because the definition Overlap says that the term applies to boats sailing more than ninety degrees from the wind. However, in open water, this fact has no further significance in the rules. BLUE on port must keep clear of YELLOW on starboard. Main Menu Section Start 61
  • 62. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Are Yellow and Blue overlapped? Main Menu Section Start 62
  • 63. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Are Yellow and Blue overlapped? Yes, even though they are on opposite tacks, both because rule 18, Mark- Room, applies, and also because they are both sailing more than ninety degrees from the true wind. In this case, BLUE on port still has to keep clear of YELLOW on starboard, but rule 18 puts a limitation on YELLOW, which will have to give mark-room. Main Menu Section Start 63
  • 64. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is Blue clear ahead of Yellow? IS Yellow clear astern of Blue? The terms Clear Astern and Clear Ahead do not apply to boats on opposite tacks away from marks and obstructions. This situation is resolved by rule 10 that deals with opposite-tack boats, and not by rule 12 that deals with same-tack boats where one is clear astern of the other. Main Menu Section Start 64
  • 65. Start show We’re racing! Definition, Clear Astern and Clear Ahead; Overlap Is Blue clear ahead of Yellow? IS Yellow clear astern of Blue? YES. The terms Clear Astern and Clear Ahead apply to opposite-tack boats when rule 18 applies, or when both boats are sailing more than ninety degrees from the wind. Both of these criteria make this a clear-ahead / clear-astern situation. As we will see, BLUE on port still has to keep clear of YELLOW on starboard, but rule 18 requires clear-astern YELLOW to give mark- room to clear-ahead BLUE Main Menu Section Start 65
  • 66. Start Section Start show We’re racing! Italics mean a defined word or Three Main Rules term When boats are on opposite tacks, a port-tack boat shall keep clear of a starboard-tack boat. (Rule 10) When boats are on the same tack and overlapped, a windward boat shall keep clear of a leeward boat. (Rule 11) When boats are on the same tack, and NOT overlapped, a boat clear astern shall keep clear of a boat clear ahead. (Rule 12) Keep Clear One boat keeps clear of another if the other can sail her course with no need to take avoiding action and, when the boats are overlapped on the same tack, if the leeward boat can change course in both directions without immediately making contact with the windward boat. Main Menu Section Start 66
  • 67. Start show Start Section We’re racing! Definition, Keep Clear Is RED keeping clear of GREEN? What is the test for rule 10? When boats are on opposite tacks, the test is whether GREEN, the starboard-tack right-of-way boat, „can sail her course with no need to take avoiding action‟. Can you make that judgement from this diagram? FACTORS • Wind and weather • Size and manoeuvrability of the boats • Speed of boats, and are speeds different? • Eye contact between helms • Hail from RED that she will duck – and a duck! Main Menu Section Start 67
  • 68. Start show Start Section We’re racing! Definition, Keep Clear Is RED keeping clear of GREEN? What is the test for rule 10? When boats are on opposite tacks, the test is whether GREEN, the starboard-tack right-of-way boat, „can sail her course with no need to take avoiding action‟. Can you make that judgement from this diagram? FACTORS • Wind and weather • Size and manoeuvrability of the boats • Speed of boats, and are speeds different? Main Menu Section Start 68
  • 69. Start show We’re racing! Definition, Keep Clear Is BLUE keeping clear of YELLOW? What is the test for rule 12? When boats are on the same tack but not overlapped, the test is still whether YELLOW, the right-of-way boat, can „sail her course with no need to take avoiding action.‟ Can you make that judgement from this diagram? FACTORS •Wind and weather •Size and manoeuvrability of the boats • Is BLUE closing on YELLOW? Main Menu Section Start 69
  • 70. Start show We’re racing! Definition, Keep Clear In all these cases – opposite tacks, or same tack, not overlapped - the test is whether the right-of-way boat, can „sail her course with no need to take avoiding action‟. So it‟s not just a question of what the keep-clear boat is doing. Rather, it‟s the effect of the keep-clear boat‟s actions on the right-of-way boat. Main Menu Section Start 70
  • 71. Start show We’re racing! Definition, Keep Clear Is BLUE keeping clear of YELLOW? What is the test? The test is first whether YELLOW, the right-of-way boat, can sail her course with no need to take avoiding action. If their courses are parallel, even if BLUE is close, YELLOW can sail her course. Is BLUE keeping clear? Main Menu Section Start 71
  • 72. Start show We’re racing! Definition, Keep Clear Is BLUE keeping clear of YELLOW? What is the test? The test is first whether YELLOW, the right-of-way boat, can sail her course with no need to take avoiding action. If their courses are parallel, even if BLUE is close, YELLOW can sail her course. But as they are overlapped on the same tack, the test is secondly whether the leeward boat can change course (hypothetically) in BOTH directions without immediate contact. Is BLUE keeping clear? Main Menu Section Start 72
  • 73. Start show We’re racing! Definition, Keep Clear Is BLUE keeping clear of YELLOW? What is the test? …the test is secondly whether the leeward boat can change course (hypothetically) in BOTH directions without immediate contact. If YELLOW were to luff, there may be contact, but probably not immediately. So BLUE passed that part of the test. Is BLUE keeping Suppose a luff clear? by YELLOW Main Menu Section Start 73
  • 74. Start show We’re racing! Definition, Keep Clear Is BLUE keeping clear of YELLOW? What is the test? …the test is secondly whether the leeward boat can change course (hypothetically) in BOTH directions without immediate contact. If YELLOW were to luff, there may be contact, but probably not immediately. So BLUE passed that part of the test. But if YELLOW were to bear away, and there would be contact, it is more likely to be immediate. If that‟s what a protest committee thinks, then BLUE was not initially keeping clear. Is BLUE keeping Suppose a luff Suppose a bear- clear? by YELLOW away by YELLOW Main Menu Section Start 74
  • 75. Start show Start Section We’re racing! Rule 10 - On Opposite Tacks When boats are on opposite tacks, a port-tack boat shall keep clear of a starboard tack boat. Which boat would you prefer to be? Main Menu Section Start 75
  • 76. Start Section Start show We’re racing! Rule 10 - On Opposite Tacks When boats are on opposite tacks, a port-tack boat shall keep clear of a starboard tack boat. Which boat would you prefer to be? Main Menu Section Start 76
  • 77. Start Section Start show We’re racing! Rule 10 - On Opposite Tacks When boats are on opposite tacks, a port-tack boat shall keep clear of a starboard tack boat. Which boat would you prefer to be? Main Menu Section Start 77
  • 78. Start Section Start show We’re racing! Rule 10 - On Opposite Tacks When boats are on opposite tacks, a port-tack boat shall keep clear of a starboard tack boat. Which boat would you prefer to be? Main Menu Section Start 78
  • 79. Start Section Start show We’re racing! Rule 10 - On Opposite Tacks When boats are on opposite tacks, a port-tack boat shall keep clear of a starboard tack boat. Which boat would you prefer to be? Main Menu Section Start 79
  • 80. Start Section Start show We’re racing! Rule 11 - On the Same Tack, Overlapped When boats are on the same tack and overlapped, a windward boat shall keep clear of a leeward boat. Main Menu Section Start 80
  • 81. Start Section Start show We’re racing! SPOT THE DIFFERENCE Main Menu Section Start 81
  • 82. Start Section Start show We’re racing! Rule 12 - On the Same Tack, Not Overlapped When boats are on the same tack, and NOT overlapped, a boat clear astern shall keep clear of a boat clear ahead. Main Menu Section Start 82
  • 83. Start Section Start show We’re racing! Rule 13 - While Tacking After a boat passes head to wind, she shall keep clear of other boats until she is on a close-hauled course. During that time rules 10, 11 and 12 do not apply. If two boats are subject to this rule at the same time, the one on the other‟s port side or the one astern shall keep clear. „Tacking‟ is not a defined. The word in the rule title is used in its general sense of going from one tack to the other. However, the words of the rule itself apply to only a part of this action, from when a boat passes head to wind until she is on a close-hauled course. Her sails need not be full at that moment. During that time, a boat shall keep clear of other boats. The previous three rules (10, 11, 12) don‟t apply at that time. A tacking boat is always on one tack or the other. The tack changes when passing head to wind. Main Menu Section Start 83
  • 84. Start Section Start show We’re racing! So Rule 13 suspends the three main rules when a boat has passed head to wind but is not yet on a close-hauled course YELLOW has right of way under rule 10 BLUE must keep clear (port and starboard) Main Menu Section Start 84
  • 85. Start Section Start show We’re racing! So Rule 13 suspends the three main rules when a boat has passed head to wind but is not yet on a close-hauled course BLUE must keep clear YELLOW still has right of way under rule 10 (port and starboard) YELLOW has right of way under rule 10 BLUE must keep clear (port and starboard) Main Menu Section Start 85
  • 86. Start Section Start show We’re racing! So Rule 13 suspends the three main rules when a boat has passed head to wind but is not yet on a close-hauled course BLUE temporarily has YELLOW has passed head to wind and right of way must now keep clear of BLUE BLUE must keep clear YELLOW still has right of way under rule 10 (port and starboard) YELLOW has right of way under rule 10 BLUE must keep clear (port and starboard) Main Menu Section Start 86
  • 87. Start Section Start show We’re racing! So Rule 13 suspends the three main rules when a boat has passed head to wind but is not yet on a close-hauled course YELLOW has reached a close-hauled course and so has regained right of BLUE must keep clear way, under rule 11, (windward and leeward) BLUE temporarily has YELLOW has passed head to wind and right of way must now keep clear of BLUE BLUE must keep clear YELLOW still has right of way under rule 10 (port and starboard) YELLOW has right of way under rule 10 BLUE must keep clear (port and starboard) Main Menu Section Start 87
  • 88. Start Section Start show We’re racing! Two boats that have passed head to wind but are neither yet close-hauled YELLOW BLUE has right must keep of way clear under under rule rule 10 10 Main Menu Section Start 88
  • 89. Start Section Start show We’re racing! Two boats that have passed head to wind but are neither yet close-hauled YELLOW BLUE has right must keep of way clear under under rule rule 10 10 Main Menu Section Start 89
  • 90. Start Section Start show We’re racing! Two boats that have passed head to wind BLUE but are neither yet YELLOW has right close-hauled must keep of way clear under under rule rule 13 13 YELLOW BLUE has right must keep of way clear under under rule rule 10 10 Main Menu Section Start 90
  • 91. Start Section Start show We’re racing! Rule 14 - Avoiding Contact A boat shall avoid contact with another boat if reasonably possible. However, a right-of-way boat or one entitled to room or mark-room (a) need not act to avoid contact until it is clear that the other boat is not keeping clear or giving room or mark-room, and (b) shall not be penalized under this rule unless there is contact that causes damage or injury. Keeping clear is more than just avoiding contact. So this rule does not add to the requirements of a keep-clear boat Despite the first line of the rule, it‟s safer and fairer for a right-of-way boat to „stand on‟ until it is clear that the keep-clear boat isn‟t doing so Even if a right-of-way or room-entitled boat wrongfully allows a collision to happen, she will be penalized only when damage or injury results So a right-of-way boat or one entitled to room or mark-room can break the first line of this rule - at her own risk Main Menu Section Start 91
  • 92. Start Section Start show We’re racing! Rule 15 - Acquiring Right of Way When a boat acquires right-of-way, she shall initially give the other boat room to keep clear…. Keep clear, clear astern 1 1 Right of way, clear ahead Main Menu Section Start 92
  • 93. Start Section Start show We’re racing! Rule 15 - Acquiring Right of Way When a boat acquires right-of-way, she shall initially give the other boat room to keep clear…. Keep clear, clear astern 2 Keep clear, 2 Right of way, clear astern 1 clear ahead 1 Right of way, clear ahead Main Menu Section Start 93
  • 94. Start Section Start show We’re racing! Rule 15 - Acquiring Right of Way When a boat acquires right-of-way, she shall initially give the other boat room to keep clear…. Keep clear, windward 3 Right of way, Keep clear, leeward 3 clear astern 2 Keep clear, 2 Right of way, clear astern 1 clear ahead 1 Right of way, clear ahead Main Menu Section Start 94
  • 95. Start Section Start show We’re racing! Rule 15 - Acquiring Right of Way When a boat acquires right-of-way, she shall initially give the other boat room to keep clear…. Keep clear, Right of way beyond head Keep clear, 4 to wind windward 4 3 Right of way, Keep clear, leeward 3 clear astern 2 Keep clear, 2 Right of way, clear astern 1 clear ahead 1 Right of way, clear ahead Main Menu Section Start 95
  • 96. Start Section Start show We’re racing! Rule 15 - Acquiring Right of Way When a boat acquires right-of-way, she shall initially give the other boat room to keep clear…. Right of way, Keep clear, starboard port tack 5 Keep clear, Right of way beyond head 5 Keep clear, 4 to wind windward 4 3 Right of way, Keep clear, leeward 3 clear astern 2 Keep clear, 2 Right of way, clear astern 1 clear ahead 1 Right of way, clear ahead Main Menu Section Start 96
  • 97. Start Section Start show We’re racing! Rule 15 - Acquiring Right of Way When a boat acquires right-of-way, she shall initially give the other boat room to keep clear… unless she acquires right of way because of the other boat’s actions. Keep clear, 1 clear astern Right of way, 1 clear ahead Main Menu Section Start 97
  • 98. Start Section Start show We’re racing! Rule 15 - Acquiring Right of Way When a boat acquires right-of-way, she shall initially give the other boat room to keep clear… unless she acquires right of way because of the other boat’s actions. Keep clear, 2 clear astern Right of way, 2 Keep clear, clear ahead 1 clear astern Right of way, 1 clear ahead Main Menu Section Start 98
  • 99. Start Section Start show We’re racing! Rule 15 - Acquiring Right of Way When a boat acquires right-of-way, she shall initially give the other boat room to keep clear… unless she acquires right of way because of the other boat’s actions. Keep clear, windward Right of way, 3 leeward Keep clear, 3 2 clear astern Right of way, 2 Keep clear, clear ahead 1 clear astern Right of way, 1 clear ahead Main Menu Section Start 99
  • 100. Start Section Start show We’re racing! Rule 15 - Acquiring Right of Way When a boat acquires right-of-way, she shall initially give the other boat room to keep clear… unless she acquires right of way because of the other boat’s actions. Keep clear, Right of way beyond head to wind 4 Keep clear, 4 windward Right of way, 3 leeward Keep clear, 3 2 clear astern Right of way, 2 Keep clear, clear ahead 1 clear astern Right of way, 1 clear ahead Main Menu Section Start 100
  • 101. Start Section Start show We’re racing! Rule 16 - Changing Course 16.1 When a right-of-way boat changes course, she shall give the other boat room to keep clear. Main Menu Section Start 101
  • 102. Start Section Start show We’re racing! Rule 16 - Changing Course 16.1 When a right-of-way boat changes course, she shall give the other boat room to keep clear. • So the rate of any change of course by the right-of-way boat is limited by how close the other boat is, before and during the change of course • If the give-way boat responds promptly, and in a seamanlike way in the prevailing conditions, yet is unable to keep clear, the right-of-way boat has not given her room to keep clear • There is an exception when boats are rounding a mark, as we shall see later Main Menu Section Start 102
  • 103. Start Section Start show We’re racing! Rule 16 - Changing Course 16.1 When a right-of-way boat changes course, she shall give the other boat room to keep clear. 16.2 In addition, when after the starting signal a port-tack boat is keeping clear by sailing to pass astern of a starboard-tack boat, the starboard-tack boat shall not change course if as a result the port- tack boat would immediately need to change course to continue keeping clear. Main Menu Section Start 103
  • 104. Start Section Start show We’re racing! Rule 16.2 Additional to rule 16.1 After the starting signal - P is keeping clear - by sailing to pass astern of S - Main Menu Section Start 104
  • 105. Start Section Start show We’re racing! Rule 16.2 Additional to rule 16.1 After the starting signal - P is keeping clear - by sailing to pass astern of S - GREEN (S) will not break rule 16.1 if RED (P) has room as defined to which alters towards her - duck or tack to keep clear and P now needs to change course immediately to keep But GREEN breaks rule 16.2 if RED clear now needs to act immediately to keep clear Rule 16.2 works in a narrow window – if GREEN changes course before it applies, GREEN breaks no rule But if GREEN changes course after it applies, GREEN breaks rule 16.1 Main Menu Section Start 105
  • 106. Start Section Start show We’re racing! Rule 17 Rule 17 An overlap to leeward from clear astern and within two lengths Not Rule 17 Main Menu Section Start 106
  • 107. Start show Start Section We’re racing! Rule 17 Rule 17 An overlap to leeward from clear astern and within two lengths While they remain on the same tack and overlapped and… Rule 17 over Main Menu Section Start 107
  • 108. Start Section Start show We’re racing! Rule 17 L breaks rule 17 An overlap to leeward from clear astern and within two lengths L's proper course While they remain on the same tack and overlapped and… are still within two of L‟s lengths… Rule 17 stops applying to L L must not sail above her proper course… L's proper course Main Menu Section Start 108
  • 109. Start Section Start show We’re racing! Rule 17 BLUE breaks rule 17 An overlap to leeward from clear astern and within two lengths L's proper course While they remain on the same tack and overlapped and… are still within two of L‟s lengths… BLUE still breaks rule 17 even though she's not L must not sail above her proper near YELLOW course… L's proper course Main Menu Section Start 109
  • 110. Start Section Start show We’re racing! Rule 17 BLUE IS BREAKING RULE 17... An overlap to leeward from clear astern and within two lengths L' cou s pr rse op While they remain on the same er tack and overlapped and… are still within two of L‟s lengths… L must not sail above her proper ...unless she promptly sails astern of yellow course… Unless she sails astern Main Menu Section Start 110
  • 111. Start Section Start show We’re racing! Rule 17 4 Ru YE …This rule does not apply if the le 3 13 LOW overlap begins when the 4 ap L windward boat is required by rule plie 13 to keep clear. st 3 2 o BLUE becomes overlapped while L' cou 2 YELLOW is between head to s pr rse op wind and close hauled 1 er 1 So here, rule 17 DOES NOT restrict BLUE. She can luff above a proper course at any time during this overlap Main Menu Section Start 111
  • 112. Start Section Start show We’re racing! Rule 17 4 R ul YE 3 …This rule does not apply if the e 13 LL ap OW overlap begins while the pl ie windward boat is required by rule s to 4 13 to keep clear. 2 Here, that hasn‟t happened. 3 When rule 13 stopped applying to 1 YELLOW at position 3, BLUE had not yet become overlapped. Only L' cou s after that did the overlap begin. pr rse 2 op er Rule 17 DOES apply, and BLUE must not luff above a proper 1 course after position 4. Main Menu Section Start 112
  • 113. Start Section We’re racing! Test your Knowledge Shortly before the starting signal, you in BLUE see YELLOW for the first time. YELLOW is head to wind. Which keeps clear of which? Main Menu Section Start 113
  • 114. Start Section Start show We’re racing! Test your Knowledge It depends on which tack YELLOW is on. You need more information. YELLOW is on the tack on which she approached the line and stopped. Main Menu Section Start 114
  • 115. Start Section Start show We’re racing! Test your Knowledge It depends on which tack YELLOW is on. You need more information. YELLOW is on the tack on which she approached the line and stopped. If she came in on port tack, she is still on port. Which keeps clear, and under which rule? Main Menu Section Start 115
  • 116. Start Section Start show We’re racing! Test your Knowledge It depends on which tack YELLOW is on. You need more information. YELLOW is on the tack on which she approached the line and stopped. If she came in on port tack, she is still on port. YELLOW keeps clear, rule 10 (port & starboard) Next Section Main Menu Section Start 116
  • 117. Start Section Start show We’re racing! Test your Knowledge It depends on which tack YELLOW is on. You need more information. YELLOW is on the tack on which she approached the line and stopped. If she came in on starboard tack, she is still on starboard. Which keeps clear, and under which rule? Main Menu Section Start 117
  • 118. Start show We’re racing! Test your Knowledge It depends on which tack YELLOW is on. You need more information. YELLOW is on the tack on which she approached the line and stopped. If she came in on starboard tack, she is still on starboard. Same tack, overlapped, windward (BLUE) keeps clear under rule 11 Main Menu Section Start 118
  • 119. Start Section Start show We’re racing! Test your Knowledge For each YELLOW - BLUE pair, which keeps clear of which? Main Menu Section Start 119
  • 120. Start Section Start show We’re racing! Test your Knowledge P S W W S P P S P S L L Main Menu Section Start 120
  • 121. Start Section Start show We’re racing! Test your Knowledge P S W W S P P S P S L L BLUE (11) BLUE (11) YELLOW (10) BLUE (10) - are the keep clear boats Main Menu Section Start 121
  • 122. Start show We’re racing! Test your Knowledge After start, RED will clear GREEN, then a windshift lifts GREEN and backs RED. There is a protest. RED‟s case: GREEN broke rule 16.2 because I had to luff immediately after her course change. GREEN‟s case. Simple port / starboard – and I was entitled to take advantage of the windshift. Main Menu Section Start 122
  • 123. Start Section Start show We’re racing! Test your Knowledge Both are wrong. Not rule 16.2, as RED was passing ahead, not astern. GREEN has to comply with rule 16.1, even when being lifted on a shift. Main Menu Section Start 123
  • 124. Start Section Start show We’re racing! Test your Knowledge Both are wrong. Not rule 16.2, as RED was passing ahead, not astern. GREEN has to comply with rule 16.1, even when being lifted on a shift. When GREEN was lifted, RED now had to act to keep clear. Did RED have room to keep clear by tacking promptly in a seamanlike way in the prevailing conditions? If so, GREEN did not break rule 16.1, and RED broke rule 10 (port and starboard) by making the wrong decision and bearing away. If not, then GREEN altered too close to RED and broke rule 16.1 It will all depend on the conditions. Main Menu Section Start 124
  • 125. GOING BY THE RULES What’s cooking? THE MAIN COURSE STARTERS Basically and Fundamentally… What‟s new for 2009 – quick guide We‟re racing! What‟s new for 2009 – in detail We‟re starting! INGREDIENTS We‟re rounding! Reading the signals We‟re taking turns! Major definitions in action We‟re finishing! The Racing Rules of Sailing We‟re unhappy! The Definitions 125