quadcopter lands and takes off from water

http://60abc.com/us-navys-solar-drone-flies-from-and-lands-on-water/

"The new system will only need a few hours exposure to the sun and be ready to hunt enemy subs for the US navy.
Designed to 'launch and forget', the new drone will be left on water for 23 hours and fly for an hour each day according to Dr. Jones."

Inventiveness is making quadcopters useful everywhere!