best mate got one (the apple 3), I checked his files through gps results, consistent data recorded every sec.
Perfectly waterproof for windsurfing and crashing (he does that a lot)
he downloaded an app (windsport I seem to remember)

cheers

How does the Apple Watch log GPS tracks? Does it use Doppler and is it SDOP?

Just wrap it on your wrist with glad wrap as seen in the GW60 thread

John340 said..
How does the Apple Watch log GPS tracks? Does it use Doppler and is it SDOP?

no idea, probably not

I have been sailing with one for ages now but haven't found a decent app to re record or log tracks yet.Sean do you mind confirming the app your mate uses?
cheers

seanhogan said..
one of them uses "gps watch workout", then uploads to ka72
apps.apple.com/us/app/gps-watch-workout/id1168169205

another is using waterspeed :
www.waterspeedapp.com/
(this one seems better)

Awesome Sean cheers
will check them out!

I have the latest Apple watch and have just installed waterspeed which is free, though it costs a bit more if you want more advanced features. I haven't used the app as yet. The watch is excellent for me when I'm "on call" so now I can go sailing or supping and still available when required. I have had no problems with the waterproofing so far. Also good as a safety device, as it has a SOS function.

Looks like it can.

Hang on, I do on-call 7 days a month, I've got to respond within 10 minutes of a call
So I can re direct the on call phone to the watch, and respond to a call within time and still be on the water.

7 days extra available for sailing, partially tax deductible Iwatch and I can log my session

Far canal, why didn't I think of this before ?

Thank you Seabreezers