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The supply ship MV American Tern during cargo operations at McMurdo Station in the Antarctic in 2007

A motor ship or motor vessel is a ship propelled by an engine, usually a diesel engine. The name of motor ships are often prefixed with MS, M/S, MV^[1] or M/V.^[2]

The term steamer is occasionally used, out of nostalgia, for diesel motor-driven vessels, prefixed "MV". Screw-driven steamships generally carry the prefix letters "SS" before their names, meaning 'Steam Ship' (or possibly 'screw-driven steamship'), paddle steamers usually carry the prefix "PS" and steamships powered by steam turbine may be prefixed "TS" (turbine ship).

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.
• Royal Mail Ship Royal mail steamer, or ship
• Ship prefix

References