MANNED SUBMARINES and ROVâ??s FOR SALE SUBMERSIBLE MOTORS & ROVâ??S Submersible motors (5hp to 1500hp) with a choice of voltages (ranging from 380vac to 6600vac) for use subsea High quality submersible motors and thruster units for Rovs, underwater trenchers, ploughs and submarines. Output from 1Kw to 1500Kw, with voltages to 6000vac. Operational depth to 4000m available.