I was tidying up in my basement today, near my collection of windsurfing gear (It's like an art collection at the moment.. good for nothing except looking at occasionally) when a mash up of thoughts from the forum occurred to me...

Partly sparked off from Mr. No One's hanggliding thread, and partly from my experiences flying paragliders...

Do any GPS units come with a 'vario' equivalent? The altimeter vario is a device which emits a series of beeps at different frequencies to indicate lift or sink to the pilot (whether they're going up or down, and at what rate). It means that the pilot can adjust what they are doing in order improve their altitude without needing to look at their display.

It seems to me that it would be a good thing to have in a windsurfing GPS as an instant feedback on your trim and technique rather than waiting until the end of the NM to see how you did?

Maybe it's a thought that's already been had, and I just haven't noticed it anywhere?