The prototype, known as Manta Ray, was built by Northrop Grumman.
[Ads /]
It was shipped to California in sections, demonstrating its easy assembly and rapid deployment around the world.
[Ads /]
The craft uses buoyancy-driven gliding to move through the water "without need for on-site human logistics," according to the company. It also has several different-sized payload bays that are useful for a variety of Navy missions.