A motor ship or motor vessel is a shippropelled by an internal combustion engine, usually a diesel engine. The name of motor ships are often prefixed with MS, M/S, MV[1] or M/V.[2]
See also
Gas Turbine Ship (GTS) — prefix for a jet-engine/turbine propelled ship.
Steam ship — a Steam Ship is a ship propelled by a steam engine or steam turbine. The name of steam ships are often prefixed with SS or S/S.