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The Rules concerning shapes shall be complied with by day.
[object Object],[object Object],A. Shapes shall be black and of the following sizes:  2. a cone shall have a base diameter of not less than 0.6 meter and a height equal to its diameter;  3. a cylinder shall have a diameter of at least 0.6 meter and a height of twice its diameter;  ,[object Object]
VERTICAL DISTANCE BETWEEN SHAPES (c) In a vessel of less than 20 meters in length shapes of lesser dimensions but commensurate with the size of the vessel may be used and the distance apart may be correspondingly reduced.  ,[object Object]
Click , each of  the rectangle buttons and view  the corresponding shapes. Conical shape apex together Conical shape apex upward Conical shape apex downward Three black balls One black ball Two black balls Black Diamond Black Cylinder
Sailing Vessel Fishing Vessel Not Under Command Constrained by Her Draft Dredging   Mine Clearance Operation Vessel Towing Vessel at anchor Vessel Aground Restricted in Her Ability to Maneuver Sea plane or WIG craft
SAILING VESSEL (e) A vessel proceeding under sail when also being propelled by machinery shall exhibit forward where it can best be seen a conical shape, apex downwards.  RULE 25
FISHING VESSEL A vessel engaged in fishing, shall exhibit:  a shape consisting of two cones with apexes together in a vertical line one above the other;  when there is outlying gear extending more than 150 meters horizontally from the vessel, an all-round white light or a cone apex upwards in the direction of the gear;  RULE 26 (b) & (c)
VESSEL TOWING A power-driven vessel when towing shall exhibit:  > when the length of the tow exceeds 200 meters, both vessels shall exhibit, a diamond shape where it can best be seen.  RULE 24 a(iv) & e(iii) > 200 meters > 200 meters
When a pushing vessel and a vessel being pushed ahead are rigidly connected in a composite unit they shall be regarded as a power-driven vessel. RULE 24 (b) VESSEL PUSHING AS A COMPOSITE UNIT
An inconspicuous, partly submerged vessel or object, or combination of such vessels or objects being towed, shall exhibit:  a diamond shape at or near the aftermost extremity of the last vessel or object being towed If the length of the tow exceeds 200 meters an additional diamond shape where it can best be seen and located as far forward as is practicable.  TOWING PARTLY SUBMERGE OBJECT > 200 meters
RULE 27 (a) VESSELS NOT UNDER COMMAND  A vessel not under command shall exhibit: (ii) two balls or similar shapes in a vertical line where they can best be seen.
A VESSEL RESTRICTED IN HER ABILITY TO MANEUVER  RULE 27 (b) A vessel restricted in her ability to maneuver, except a vessel engaged in mine-clearance operations, shall exhibit: (ii) three shapes in a vertical line where they can best be seen. The highest and lowest of these shapes shall be balls and the middle one a diamond.
A VESSEL RESTRICTED IN HER ABILITY TO MANEUVER  RULE 27 (d) A vessel engaged in dredging or underwater operations, when restricted in her ability to maneuver, shall exhibit: in addition, when an obstruction exists, exhibit:  ,[object Object],[object Object]
VESSELS CONSTRAINED BY THEIR DRAFT A t day time, a vessel constrained by her draft shall  exhibit, where it can best be seen, a black cylinder. RULE 28
A vessel at anchor shall exhibit where it can best be seen:  (i) in the fore part, an all-round one ball. ANCHORED VESSELS  RULE 30 (a)
A vessel aground shall exhibit: > three balls in a vertical line.  VESSEL AGROUND RULE 30 (d)
Where it is impracticable for a seaplane or a WIG craft to exhibit shapes of the characteristics or in the positions prescribed in the Rules of this Part she shall shapes as closely similar in characteristics and position as is possible.  SEAPLANES AND WIG CRAFT RULE 31
A vessel engaged in mineclearance operations shall exhibit three balls .  RULE 27(f)  A VESSEL ENGAGED IN MINECLEARANCE OPERATIONS  These shapes indicate that it is dangerous for another vessel to approach within 1000 meters of the mineclearance vessel.  One of these shapes shall be exhibited near the foremast head and one at each end of the fore yard.

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Colreg shape animation

  • 1. The Rules concerning shapes shall be complied with by day.
  • 2.
  • 3.
  • 4. Click , each of the rectangle buttons and view the corresponding shapes. Conical shape apex together Conical shape apex upward Conical shape apex downward Three black balls One black ball Two black balls Black Diamond Black Cylinder
  • 5. Sailing Vessel Fishing Vessel Not Under Command Constrained by Her Draft Dredging Mine Clearance Operation Vessel Towing Vessel at anchor Vessel Aground Restricted in Her Ability to Maneuver Sea plane or WIG craft
  • 6. SAILING VESSEL (e) A vessel proceeding under sail when also being propelled by machinery shall exhibit forward where it can best be seen a conical shape, apex downwards. RULE 25
  • 7. FISHING VESSEL A vessel engaged in fishing, shall exhibit: a shape consisting of two cones with apexes together in a vertical line one above the other; when there is outlying gear extending more than 150 meters horizontally from the vessel, an all-round white light or a cone apex upwards in the direction of the gear; RULE 26 (b) & (c)
  • 8. VESSEL TOWING A power-driven vessel when towing shall exhibit: > when the length of the tow exceeds 200 meters, both vessels shall exhibit, a diamond shape where it can best be seen. RULE 24 a(iv) & e(iii) > 200 meters > 200 meters
  • 9. When a pushing vessel and a vessel being pushed ahead are rigidly connected in a composite unit they shall be regarded as a power-driven vessel. RULE 24 (b) VESSEL PUSHING AS A COMPOSITE UNIT
  • 10. An inconspicuous, partly submerged vessel or object, or combination of such vessels or objects being towed, shall exhibit: a diamond shape at or near the aftermost extremity of the last vessel or object being towed If the length of the tow exceeds 200 meters an additional diamond shape where it can best be seen and located as far forward as is practicable. TOWING PARTLY SUBMERGE OBJECT > 200 meters
  • 11. RULE 27 (a) VESSELS NOT UNDER COMMAND A vessel not under command shall exhibit: (ii) two balls or similar shapes in a vertical line where they can best be seen.
  • 12. A VESSEL RESTRICTED IN HER ABILITY TO MANEUVER RULE 27 (b) A vessel restricted in her ability to maneuver, except a vessel engaged in mine-clearance operations, shall exhibit: (ii) three shapes in a vertical line where they can best be seen. The highest and lowest of these shapes shall be balls and the middle one a diamond.
  • 13.
  • 14. VESSELS CONSTRAINED BY THEIR DRAFT A t day time, a vessel constrained by her draft shall exhibit, where it can best be seen, a black cylinder. RULE 28
  • 15. A vessel at anchor shall exhibit where it can best be seen: (i) in the fore part, an all-round one ball. ANCHORED VESSELS RULE 30 (a)
  • 16. A vessel aground shall exhibit: > three balls in a vertical line. VESSEL AGROUND RULE 30 (d)
  • 17. Where it is impracticable for a seaplane or a WIG craft to exhibit shapes of the characteristics or in the positions prescribed in the Rules of this Part she shall shapes as closely similar in characteristics and position as is possible. SEAPLANES AND WIG CRAFT RULE 31
  • 18. A vessel engaged in mineclearance operations shall exhibit three balls . RULE 27(f) A VESSEL ENGAGED IN MINECLEARANCE OPERATIONS These shapes indicate that it is dangerous for another vessel to approach within 1000 meters of the mineclearance vessel. One of these shapes shall be exhibited near the foremast head and one at each end of the fore yard.