OpenROV.Org is a community funded project that introduces people to Do-It-Yourself ocean exploring.
Dimensions: 30cm x 20cm x 15cm
Depth rating: ~100m
Power: 8 onboard C batteries
Run time: ~1.5 hours
Body construction: Laser cut acrylic
Buoyancy: Inherently neutrally buoyant
Propulsion: 3 brushless motors (2 horizontal thrusters, 1 vertical thruster)
Tether: 1 single twisted pair communicating 10 megabit ethernet data for control and video
Control: Onboard embedded linux computer (beagleboard brand) controlled via remote web browser
Vision: Forward facing HD USB webcam and two 87lm LED light arrays on servo-tiltable platform
Design considerations: Completely open source / open hardware, off the shelf parts, small enough to test in a bathtub, kit can be assembled in one weekend, standardized payload bay.