Two young engineers will soon be attempting a 250 kilometer crossing of the English channel in a pedal powered submarine. The two friends, Antoine Delafargue and Michael de Lagarde, are passionate about technical challenges, exploration, and sustainable management of natural resources. Their plan is to travel from Plymouth, England to Saint-Malo, France just a few meters above the sea floor in their human powered sub equipped with variety of observation instruments. The two pilots will provide propulsion through pedals attached to a crankshaft which is connected to a drive train that turns the sub’s propeller. The sealed hull is constructed of wood, fiberglass and a resin composite and has many of the features found on full a size submarine including ballast tanks, CO2 scrubbers, bow thrusters, and a sonar. The sub also has a number of safety features such as an emergency buoy and an acoustic pinger. The pinger will allow a surface vessel to track the sub throughout it’s journey.