Are you supposed to disable the down view sensors when flying over water?  If so, what height is the concern over water?
If you are flying 50 foot above water - is that really necessary?

Thanks !!

Hi, it's advised to turn off P3A/P3P 's VPS when you expect to fly low above surface of water. Their VPS is only effective for 10 feet. So if you're flying higher than that, it doesn't really matter.

On P4, currently you can not switch VPS off.