True wind direction and velocity are simple vector calculations using boatspeed, COG, apparent wind direction, and apparent wind velocity. Every modern wind instrument system in the last 40 years has been able to do this with reasonable precision.I don't believe that onboard wind data is a true reflection of the actual wind direction and speed. It has to be a calculated figure due to the apparent wind factor. I realise that there is probably some algorithm that is being used but in my opinion it doesn't accurately reflect the actual conditions.
1 hour ago, Priscilla said:
22 knots with 26 peak @ Channel Island outer Hauraki Gulf may push through some puff later.
1 hour ago, 45Roller said:
Well happy birthday mate, hope you have a good one, how is the Guinness there?
for a laugh.. here's an interview with our patron saint from our favourite sailing commentator :lol: