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.
U.S. Navy develops an underwater grooming robot that does away with hull-dwelling barnacles and slime.
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.