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Board » Flag Officers » Races » Victoria-Maui Tactics Articles

Posted by
76Trombones


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2009-08-03 18:04:56
2010-06-29 13:58:19 - Victoria-Maui Tactics Articles
The website for this year's running of the Vic-Maui Yacht Race has some interesting reading on tactics and descriptions of past races.

The North Pacific High (visible as the big low-wind area at ~40N in SOL, wind circles clockwise) is a semi-permanent feature throughout the summer that typically dictates routing for the race.

http://www.vicmaui.org/resource?articleid=45
Posted by
captjack1942


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2008-01-18 03:24:03
2010-06-29 21:25:55 - Re: Victoria-Maui Tactics Articles
It should be noted that the Pacific High (as the area of low to no wind is called) has been staying pretty far north this year. If this pattern holds up, this could be a year of record times. Not only for the Vic/Maui race, but also for the Pacific Cup race.

http://www.pacificcup.org/

--- Last Edited by captjack1942 at 2010-06-29 21:27:46 ---
Posted by
Exmeromotu


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2008-12-10 15:22:17
2010-07-02 15:44:14 - Re: Victoria-Maui Tactics Articles
Public Service Anouncement:
Courtesty of Bluewater Racing, see attached pic, time of pic 1435Z

Optimal Route is in black, the closer you stay inside the red area the better...

2nd Pic Optimal Route is in yellow.

3rd Pic for 7/3/2010 12Z

4th Pic 7/4/2010 12Z (from Gilles (leader) Position)
Optimum Route is in Yellow (Follow the Yellow Brick Road ;-) )
Wide red area shows that there are plenty of routes that will get you pretty quick to Maui

5th Pic for 7/5/2010 12Z (from my position)
Optimum Route in Yellow
The Red Zone is a LOT Wider than from last update, banging a corner might just be the ticket...

6th Pic Optimum Route in Orange with reverse isochrones in 2 hour time steps time of fix 7/6/2010 0715 UTC

Regards

--- Last Edited by Exmeromotu at 2010-07-03 00:26:54 ---

--- Last Edited by Exmeromotu at 2010-07-03 14:36:14 ---

--- Last Edited by Exmeromotu at 2010-07-04 16:07:14 ---

--- Last Edited by Exmeromotu at 2010-07-05 14:16:46 ---

--- Last Edited by Exmeromotu at 2010-07-06 08:02:06 ---
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Posted by
Gilles


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2009-07-18 11:05:22
2010-07-04 19:15:50 - Re: Victoria-Maui Tactics Articles
Nice that you make the homework for me.... but difficult to read the angle or the latitude on the graph :-(

Cheers!!!
Posted by
76Trombones


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2010-07-06 16:40:21 - Re: Victoria-Maui Tactics Articles
Here's another look at reverse isochrones, calculated from Exmeromotu's position and .5deg grib.us weather. Colour bands/contours are 2h intervals.

Tight race!
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Posted by
Exmeromotu


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2010-07-06 18:47:23 - Re: Victoria-Maui Tactics Articles
Impressive!! How did you get the fleet positions into Bluewater?
Posted by
76Trombones


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2010-07-06 19:00:49 - Re: Victoria-Maui Tactics Articles
Not bad eh? I'm impressed with how flexible bluewaterracing is.

http://sailonline.org/googleearth/race_245_data.kml

I imported the data from the kml. You can bring it in as route data and each boat will show up as mark.

To import as position data (each boat becomes it's own route, can be "routed to finish" and if you were to update regularly would have all the tracks saved as well) I converted the xml/kml to csv/text.

Pretty neat - since all the course data,config,polar etc are text files for very little effort you should be able to pretty much fully integrate BWR with SOL. Marks/courses can be loaded from the kml as well, so no need to manually define the race.

Posted by
Exmeromotu


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2010-07-07 07:06:01 - Re: Victoria-Maui Tactics Articles
For whoever is interested here's a copy of the Riptide 50 polar for Bluwater

--- Last Edited by Exmeromotu at 2010-07-07 07:07:18 ---
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Posted by
Schakel


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2008-12-19 09:19:00
2010-07-07 07:15:39 - Re: Victoria-Maui Tactics Articles
Hmm, odd. I get slightly different figures using the polar I get from the client Help tab's Boat Polar option.

For instance, at ws 10, twa 30 you have a bs of 6.17 whereas I get a bs of 6.27.

Wonder how that happened?

Philip

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