From March 1st onward people can start kitesurfing and windsurfing for our new 1x10 record ranking. There are some minor technical problems left before we're able to start up the record ranking and the GPS Speed Record Technical Committee is finalizing technical aspects related to the latest firmware version presented by Tom Chalko. This might take a few days. In the meanwhile our members can start the new record hunt.
If you consider to enter the record ranking make sure to use two GT-31 devices and download the latest firmware which can be obtained at:
In case a rider expects possible high speed conditions before the final rules are presented please contact Roger van Tongeren (windsurf) or Rob Munro (kitesurf) with a short description of your record plans.
Now I guessed the older speedsurfing/speedsailing communities like WSSRC, ISWC, IKA would never agree. In my profile you see I am a Civil Engineering student, result of that is 1 year experience with high precision measurements by gps, total station, etc.
A gps handheld measurement with just with (or without) doppler is WAY different, compared to trimble-gps/videotiming.
- gps-handheld measurement without doppler, coordinate precision low, displacement precision low
- gps-handheld measurement with doppler, coordinate precision extreme low, displacement precision very good
- Trimble GPS, coordinate precision good, displacement is ok
- Videotiming, coordinate precision good but 1-dimensional, displacement only over the whole course.
As a civil engineer I have experienced the NAVI giving a whole day data exactly 30m next to the real coordinates. With a constant speed is this no problem, but when a speedsurfer accelerates the difference can grow between the 2 divices. Especially when you have to sail between to points (500m)
The gps-speedsurfing ratification is not measured in [m] but in time [s], so for the gps-speedsurfing community I think this ranking will be quite spot-on. I would advice serious speedsurfers to go for the www.gps-speedsurfing.com ranking, in the end it is just more fun, more opportunities, less costs, and sponsors/other windsurfers are now paying enough attention to the gps-speedsurfing 'fun'-ranking. And for 2009 I still haven't heard any event/recordattempt with videotiming...
-speedworldcup.com___Handheld GPS World Record Claims not recognized by ISWC and IKA