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Built by a team of engineering undergraduates from Singapore, the robotic vessel dubbed Coconut Pi uses both the Raspberry Pi and Arduino.
Juliet Marine's Ghost stealth boat produces a gas layer around its hull to move it through water with 900 times less friction.
The C-Explorer 5 is a luxury submarine worthy of being a Bond vehicle. The Q Division will probably want to add on some lasers and wheels, though.
Road Trip 2010: Aboard the Virginia class sub, North Carolina, CNET reporter Daniel Terdiman sees how the Navy has taken submarines and added servers, wireless networking, and digital periscope visualization.
U.S. Navy develops an underwater grooming robot that does away with hull-dwelling barnacles and slime.