Thank you to Ray Irvine/Jibeset
Hello Ray,
Thanks for the wonderful support you provided during the race. I
wanted to highlight that your predictions of finish times were very
accurate when the boats were within about 24 hours ( I didn't analyze
other periods). In that last period of their run to Hanalei my tracking
showed your estimates, in the 6 hour and 12 hour averaging window, were
within a few minutes, or maybe at worst 10 minutes of actuals. The only
exception was Sea Wisdom who nearly stopped within 500 meters of the
finish line when the winds dropped. That was a painful late night
period to watch. The variable averaging windows were the way to go
although some of our viewers didn't understand how to use them. That
made finishing the boats much easier as we could call out the chase boat
in a timely fashion.
Some of the random GPS returns that you noted were highly correlated
with squalls passing over the boats. Siren and Perplexity, who finished
20 min apart, were within visual range to the RC. A huge squall
clobbered them both and the GPS data showed weird variations in
position, putting them near the center of the island. I could not see
them for a few minutes just prior to the finish. I am certain that was
due to GPS signals being inaccurately timed by the GPS satellites as the
signals from the trackers would be quite degraded due to the wet squalls.
Thanks again.
Regards,
Brian