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slowboat said...
Almost every time I ask someone here how fast their last run was they say "I dont know the GPS is a bit funny/didnt show the speed etc... I'll find out later when I download". That renders the GPS useless for tuning during the day.
It works fine in some places where there is no chop, or where you stop at the end of the run and have time to fiddle. But if the end of the run is deep water where you have to gybe and sail back to the beach, you lose the speeds of the run. Most of our sailing over here is like that.
So... to turn speed genie off, and always know how fast your last run was (ie you choose when to clear the max speed)
Settings->Speed Genie->OFF
Speed Genie has a min-speed setting before it kicks in. I'll put it out there... if they are sailing back upwind at the same speed they are sailing off the wind, they are doing something wrong!

And if you are slalom sailing: If you are reading it *during* the middle of the next run, of course it wont show your peak speed, but I highly doubt that you can maintain +25kn during a gybe... at some point you will go slowing than your min speed and so the Genie updates... you could always choose to look at your last run's stats just a little earlier.
As for not being able to read it through chop... I haven't met anyone that couldn't read it in choppy conditions, given that a) it wasn't foggy b) the gps/case was located so that you can actually read it.