U.S. Navy Launches a Drone from a Submerged Submarine
defenseone.com
defenseone.com
And the endless defense spending continues.
http://nation.time.com/2012/09/25/comparing-defense-budgets-...
alternatives: satellite, long range bomber, surface fleet, seal squad...
I'd propose to wipe their memories and land them at a reasonably friendly if not secure location. (Order is important.) barring a safe landing spot, crash them as best you can. War is expensive. The last number I saw for a C5 was $5000/hour, and that was a long time ago.
I wonder if a waterproof quadcopter would navigate well underwater. It seems like it could be an interesting environment to experiment with advanced acrobatic maneuvers at lower speeds.
Secondly, a drone sub has vastly different mission capabilities than a drone aircraft.