When flying over the water you will see a lot of people says its the same as flying over land, but its always followed by :
Dont do This : Dont Do that , Stay above : Watch the Head Wind, be prepared for the Geo fence , Watch your Battery , Dont take off from a Metal Pier and above all watch for Bird Strikes.
The Water is like a Beautiful Siren that is calling out to you, Try this : Try That ; Follow that Boat: Get lower : Go faster : try out the quick shots, and many will fly further out because of the Perfect Line of sight.
I have the Lake in front of me and the River on the side of me , and there always calling out tempting me. ?
The Mini is the Weakest of Drones and more susceptible to the Treachery of the Open Water and the Sirens calling you to it.
Phantomrain.org
Gear to fly your Mini in the Rain and Land on the Water.