These machines are all ‘prototypes’, built by teams of enthusiasts of marine science, engineering and technology, to help them gain practical experience alongside theoretical studies of machines which operate in sea water.
They can take between twenty and forty thousand man-hours to design, build, test and adjust. When the hybrid-electric powered submarine is ready for the sea, it can then achieve speeds of 12-16 knots underwater – or faster than a sprinting dolphin!
The propulsion system will come from a combination of the two pilots pedalling together and an electric assist motor which activates as they provide initial power.








