Peterx Posted at 5-26 00:25
Light ray can be bowed by lenses and magnetical ray can bowed by ferromagnteic materials as iron,nickle and cobalt or fast changing electro magnetical fields.  Did you have a look,when a stick is a half in water and a a half not? What do you see?

Refraction has nothing to do with flying a Phantom.

Exact. But Phantom is a part of the DJI quadcopter fleet. Refraction can be annoying for all copter by the one more by the other less. The question is how sensitive is the compass in a used model to take of from a boat.

Peterx Posted at 5-26 06:42
Exact. But Phantom is a part of the DJI quadcopter fleet. Refraction can be annoying for all copter by the one more by the other less. The question is how sensitive is the compass in a used model to take of from a boat.

The compass is sensitive ... it has to be to work properly.