As a young and time-poor yachtie I need to get a leg up over the old barnacles who spend every afternoon out racing on the harbour. Can my two friends technology & data help me kick ass and take home the prizes?
Presented as a lightning talk at the Mix & Mash competition launch. Nov 2010, Wellington. http://www.mixandmash.org.nz/
2. Me
Auckland
2
I live in a beautiful city a wee-way north of here, and spend a hunk of my time out sailing on
the Waitemata Harbour and in the Hauraki Gulf. You really can’t beat it :)
3. Me
3
We do a bit of racing, maybe once or twice a week. For those who care, the boat is a Farr
1020 which is about 33 feet long, and was built in the glorious eighties. We mostly sail with
the Ponsonby Cruising Club who are based down near the harbour bridge.
4. Me
4
Our crew is young and beautiful, but we work hard and don’t have a lot of spare time. We
certainly can’t be out on the harbour every afternoon.
10. http://www.flickr .com/photos/ittybittiesforyou/4667430094
Tricks of the course
10
What makes a win? A faster boat helps, but handicaps cancel that out. We’re not too shabby
at our skills either. But the real key is learning the tricks of the harbour. Apparently that
comes from something called “experience”. So what are these tricks?
12. Me
Out? In?
12
Tides head in different directions in different places at different times. Should you stay out
here, or sneak right alongside that Navy ship like a would-be terrorist?
14. Me
How big is the shadow?
14
Every hill, building, and wharf casts a wind shadow and has funny winds swirling around it
and funneling nearby. If those funny winds are helping you - awesome. If they’re stopping
you from getting where you want to go? Not so good. And of course, it all depends on the
direction and strength of the wind at any particular moment.
15. Me
Follow the leader? Zzzz...
15
You’re never going to win if you just follow the boat in front of you. Well, you can always
hope that they catastrophically screw up. You really need to do something and go somewhere
different. But what? where? and when is the right time to make your move?
17. http://www.flickr .com/photos/chebbs/164258862
Secret Maps!
17
Apparently him & his evil pirate mates have a secret hand-drawn map of the harbour with all
the tricks on! Can you believe it? Might look a bit like this if it was drawn on concrete. Only
with sailing stuff instead of monkeys. Yeah. Umm. So….
18. http://www.flickr .com/photos/cassidy/417821894
18
What is the big idea? The big idea is to use some open data, mash it together, and come up
with our own interactive secret map. Only it wouldn’t be secret. That way we skip this whole
“experience” thing and get back to competing on our skills. As a bonus, someone could take
it, add their own data, and use it anywhere else in the world.
21. Me
Wind History
Time Speed Direction
12:30pm 12.2 kn 277°
12:35pm 13.1 kn 279°
12:40pm 12.7 kn 274°
12:45pm 12.3 kn 270°
12:50pm 11.0 kn 276°
12:55pm 12.1 kn 277°
1:00pm 13.6 kn 283°
1:05pm 13.1 kn 285°
1:10pm 13.3 kn 286°
1:15pm 12.9 kn 289°
21
We’ll also need to know what the wind has been like in the past, and how it changes in
different places around the harbour. NIWA, Coastguard, and the yacht clubs should be able to
help us here.
22. http://www.swanagesailingclub.org.uk/clubhouse/tidestream/tidalstream.htm
Tidal Flows
22
The port has nifty and accurate data showing how the tide changes around the harbour. As
the tides go in and out the little arrows go in lots of odd directions. They also have really
accurate data on where the shallow and deep bits start and finish. Apparently they use all this
to stop big ships crashing into wharves or something...
23. http://www.flickr .com/photos/leokan/3656810914
Tide times
Time Height
3:54am 2.9 m
9:58am 0.7 m
4:23pm 3.0 m
10:33pm 0.6 m
4:59am 3.0 m
11:02am 0.6 m
6:21pm 3.2 m
12:30am 0.4 m
7:00am 3.2 m
12:58pm 0.4 m
23
We’ll also need to know when the tides are, and how big they are going to be. Again, LINZ
can help us with this.
27. http://www.flickr .com/photos/jaredearle/4675262184/
27
We’ll also need some funky gadget to display the current winds and tide flows on, and see
what they’re predicted to be 15-30 minutes into the future. This will allow us to make better
decisions about where to go.