Just wondering what i need to do in the settings before flying the phantom 4 over the lake

Just keep it up in the air.
Land or water, the Phantom doesn't care.

I watched a video on youtube saying you need to turn off something

I've flown my P4 over a lake: https://www.skypixel.com/videos/ ... b-b073-3ba6629f7a81

My settings:

RTH Altitude: 120m
Cruising Altitude: ~50-100m
Obstacle Avoidance Enabled
Backwards Flying Disabled

classic2003@sym Posted at 2016-4-5 09:37
I watched a video on youtube saying you need to turn off something

You are thinking of the VPS but that can't  be turned off on the P4.

Oh okay thankyou

Here is a suggestion: when preparing to fly over water choose a take off (home) point that is at least 60 feet from the waters edge. Don't push battery capacity to the limit when flying over water. If you don't know why, you are not ready to fly over water.

I agree with the previous poster - keep your RTH point a reasonable distance from the water's edge and watch your battery levels.  I regularly fly over water and have had no problems.

Hi , hope this video could help you :
What's more , don't forget to pay attention to the battery level during the flight.