An arrangement of a ship’s propulsion unit includes a motor unit with a motor housing arranged in the water. The method comprises administering, to a subject previously treated for resection or reduction of a primary tumor, a chemotherapeutic agent entrapped in liposomes, the liposomes having a coating of hydrophilic polymer chains and a targeting ligand that specifically binds to micrometastases, for delivery of the chemotherapeutic agent to the micrometastases. Inertia of the switch member during initial rotation of the object results in relative movement of the switch member away from the neutral position.