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Board » Technical Support » Ranking of boats faulty?

Posted by
etxnebe


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2007-12-23 10:29:47
2009-02-17 20:27:06 - Ranking of boats faulty?
As can be seen from the uploaded picture there is only 30.4 nm differense between the leader boat KarmaFish nd the #973 ranked boat R1 BOTECO1. Can you really trust the ranking shown on your boat. When I rechecked the ranking for R1 BOTECO1 sudddenly that boat is now #1 !!!

Best regards

ETXNEBE
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Posted by
AGage


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2008-12-27 10:31:57
2009-02-18 08:40:32 - Re: Ranking of boats faulty?
Jakob discussed this here: http://sailonline.org/board/thread/1674/?page=1#post-1674 which also has a link to another thread regarding this.

One thing you can do, to get a better idea of whats going on: use the ruler tool, and START a line on cape horn. DONT click another end but sweep the tool over the fleet and different areas of the course, and watch the distances change (sometomes VERY non-intuitively!)

Hope this helps...
I help develop the client interface for the best online ocean racing sim there is... __/)/)_/)__
Posted by
etxnebe


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Registered at
2007-12-23 10:29:47
2009-02-18 19:05:01 - Re: Ranking of boats faulty?
Hello!

It is not reasonable that a boat can move from ranking #973 to be the leader boat (#1) within 15 minutes.
There must be something wrong in the caculations of the distanse.

regards,

etxnebe
Posted by
kalle


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2007-06-01 09:58:04
2009-02-18 19:50:57 - Re: Ranking of boats faulty?
The reason for the jumping is (as Jakob has said in other threads) that the rounding point for the cape jumps around (we do not calculate DTG throuugh the point, that would be unreasonable for shorter legs). This leg is exceptionally long and not really the case for which we wrote the DTG algorithm, but writing a generic algorithm that handles all corners cases is also a bit difficult.

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