I agree with Rick. No time to look at this thing when you are racing. But it is very cool to review your race afterwards.

You can upload the file to your computer and watch the whole race again. I reviewed my tacks after my last outing and they were pretty sloooooow.

If anyone does have a problem with you having this on your boat, you can set it to datalogging only - no display of speed, etc. but you have to change this setting with your computer.