GM Defense is the military product subsidiary of General Motors, headquartered in Concord, North Carolina.

It focuses on defense industry needs with hydrogen fuel cell and other advanced mobility technologies.

Naval Research Laboratory are cooperating to incorporate automotive hydrogen fuel cell systems into the next generation of Navy unmanned undersea vehicles, or UUVs.

Hydrogen fuel cell technology could augment ships and subs on patrol.

[6] Autonomous fuel cell vehicle with highly modular and adaptable superstructure.