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Donít believe your GPS all the time

Printed From: Yachts and Yachting Online
Category: General
Forum Name: Banter
Forum Discription: For all those non-sailing related discussions
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=1083
Printed Date: 10 Aug 22 at 12:00am
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com


Topic: Donít believe your GPS all the time
Posted By: Scooby_simon
Subject: Donít believe your GPS all the time
Date Posted: 06 Oct 05 at 8:44am

take a look at the speadfreaks  http://www.yachtsandyachting.com/speedfreaks/ - http://www.yachtsandyachting.com/speedfreaks/



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Wanna learn to Ski - PM me..



Replies:
Posted By: Strawberry
Date Posted: 17 Oct 05 at 3:00pm
What's going on with that Musto Skiff? There's no way it could accelerate from 11knots to 22knots in 2 seconds! That's gotta be a freak result.

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Cherub 2649 "Dangerous Strawberry


Posted By: CurlyBen
Date Posted: 17 Oct 05 at 3:13pm
Especially as in that 5 minutes it didn't get above 16kts for the rest of the time!


Posted By: Scooby_simon
Date Posted: 17 Oct 05 at 3:33pm

Originally posted by CurlyBen

Especially as in that 5 minutes it didn't get above 16kts for the rest of the time!

Indeed...

Does look a little interesting.  I would be quite interested to see the heading to see if it was a massive bear off in a big gust just prior to the 22kts.  

 

As for the comment about acceleration;   The GPS will take a plot where the heading stays the same; so if you turn your GPS on while on the slip way (boat is pointing across the slip at this point); leave it for 30 secs it will show 30 secs at heading A, turn it around (pointing down to the water and then leaving it again for 30 seconds and then walk it down the slip way 10m in 30 seconds it will show 10m in 60 seconds and so speed = 6kph.

 

This is why I would like to see the headings as per my plot (that youíll just about make out)

 

 



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Wanna learn to Ski - PM me..



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