Abstract: A system for subsea operation is described, comprising a free swimming, submersible garage and docking station (10,10?), and also an associated free swimming ROV (50), where the garage and docking station (10,10?) comprises a framework (14) arranged to function as a garage (40) or docking (40?) for the free swimming ROV (50), and where the submersible garage and docking station (10,10?) comprises at least equipment in the form of several thrusters (16,18) for operation in the vertical and horizontal directions, respectively, units and a steering system for positioning in the water, and also a winch (12) connected to said ROV (50) via a cable (34) for the transfer of electricity and signals.