New Posts New Posts RSS Feed: Don’t believe your GPS all the time
  FAQ FAQ  Forum Search   Register Register  Login Login

Don’t believe your GPS all the time

 Post Reply Post Reply
Author
Scooby_simon View Drop Down
Really should get out more
Really should get out more


Joined: 02 Apr 04
Location: United Kingdom
Online Status: Offline
Posts: 2415
Post Options Post Options   Quote Scooby_simon Quote  Post ReplyReply Direct Link To This Post Topic: Don’t believe your GPS all the time
    Posted: 06 Oct 05 at 8:44am

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



Edited by Scooby_simon
Wanna learn to Ski - PM me..
Back to Top
Strawberry View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 21 Jun 05
Location: United Kingdom
Online Status: Offline
Posts: 1337
Post Options Post Options   Quote Strawberry Quote  Post ReplyReply Direct Link To This Post 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.
Cherub 2649 "Dangerous Strawberry
Back to Top
CurlyBen View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 17 Aug 05
Location: Southampton
Online Status: Offline
Posts: 539
Post Options Post Options   Quote CurlyBen Quote  Post ReplyReply Direct Link To This Post 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!
Back to Top
Scooby_simon View Drop Down
Really should get out more
Really should get out more


Joined: 02 Apr 04
Location: United Kingdom
Online Status: Offline
Posts: 2415
Post Options Post Options   Quote Scooby_simon Quote  Post ReplyReply Direct Link To This Post 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 you’ll just about make out)

 

 

Wanna learn to Ski - PM me..
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down

Bulletin Board Software by Web Wiz Forums® version 9.665y
Copyright ©2001-2010 Web Wiz
Change your personal settings, or read our privacy policy