Framework
Various sizes of ordinary PVC solvent weld plumbing pipe. Larger diameter pipe will be used as the floatation units and will be foam filled. Smaller 22mm overflow pipe makes the frame and will be wet. I'll be aiming for just positive buoyancy.

Propulsion
Modified bilge pump motors. 2 counter rotating for forward and reverse thrust. 1 for vertically up/down. Turning will be achieved by independent use of the thrust motors.

Systems
Motors controlled by on board relays and batteries via momentary switches on the surface connected via CAT 5 umbilical.

Above: The Speleo-ROV takes shape. 13th November 2008
Photo © Toadstone

Mission Systems
The surface controller will have apart from motor controls, lighting control and the ability to view one or more of the onboard cameras. The final mission equipment will consist of a Canon G7 using CHDK, a Sony HAD-HQ1, 550 lines video link and possibly a rear facing potted reversing camera. Future additions will be the ability to record from the Sony HAD-HQ1 but in the mean time video clips can be handled by the G7.