https://gcaptain.com/u-s-naval-research-lab-launches-aerial-drone-from-submerged-submarine/
U.S. Naval Research Lab Launches Aerial Drone from Submerged Submarine
Dec 6, 2013 - The U.S. Naval Research Laboratory (NRL) has announce the successful test launch an all-electric, fuel cell-powered aerial drone from a submerged submarine.
u s naval research labaerial drone