This drone hides underwater then takes to the skies to execute its mission

We've seen experimental drones that rule that skies with speed and even mounted weapons, but a new flying drone prototype has emerged that will lie in wait for you somewhere new: under the sea. A team at the Johns Hopkins University Applied Physics Laboratory designed the CRACUNS (Corrosion Resistant Aerial Covert Unmanned Nautical System) drone to withstand both underwater pressure and the corrosive effects of salt water. See also: Pentagon confirms it has used spy drones in U.S. air space Based on a series of tests performed by the team, CRACUNS can remain submerged at a depth of several hundred feet for at least two months and then emerge from the water and elevate itself into the air using four rotor blades. To accomplish the feat, the drone researchers housed the device's components in a dry pressure vessel and coated its motors in unnamed, commercially available coatings. The CRACUNS drone is at home under water or in the air.