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Marine steam engine
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<p>A marine steam engine is a <a href="/facts/Steam_engine/f7hN8vzm">steam engine</a> that is <a href="/facts/Marine_propulsion/fmjXgupn">used to power a ship or boat</a>. This article deals mainly with marine steam engines of the <a href="/facts/Reciprocating_engine/ItLAxmW3">reciprocating</a> type, which were in use from the inception of the <a href="/facts/Steamboat/6YpKwFfp">steamboat</a> in the early 19th century to their last years of large-scale manufacture during <a href="/facts/World_War_II/2efV5L1U">World War II</a>. Reciprocating steam engines were progressively replaced in marine applications during the 20th century by <a href="/facts/Steam_turbine/scacVXsB">steam turbines</a> and <a href="/facts/Marine_diesel_engine/fmjXgupn">marine diesel engines</a>. </p>