Editing Engine room (section)

===Engines===
[[File:Vesikko engine room view aft.JPG|thumb|Engine room of the [[Finnish submarine Vesikko|Finnish submarine ''Vesikko'']] in 2010]]
The engine room of a motor vessel typically contains several engines for different purposes. Main, or propulsion, engines are used to turn the ship's [[propeller]] and move the ship through the water. They typically burn [[Diesel fuel|diesel oil]] or [[Fuel oil|heavy fuel oil]], and may be able to switch between the two. There are many propulsion arrangements for motor vessels, some including multiple engines, propellers, and gearboxes.{{citation needed|date=October 2015}}

Smaller, but still large engines drive electrical generators that provide power for the ship's electrical systems. Large ships typically have three or more [[Synchronization (alternating current)|synchronized]] generators to ensure smooth operation. The combined output of a ship's generators is well above the actual power requirement to accommodate maintenance or the loss of one generator.{{citation needed|date=October 2015}}

On a steamship, power for both electricity and propulsion is provided by one or more large [[Water-tube boiler|boiler]]s giving rise to the alternate name '''boiler room'''. High pressure steam from the boiler is used to drive [[reciprocating engine]]s or [[turbine]]s for propulsion, and also [[turbo generator]]s for electricity. Besides propulsion and auxiliary engines, a typical engine room contains many smaller engines, including [[Electric generator|generators]], air compressors, feed pumps, and fuel pumps. Today, these machines are usually powered by small diesel engines or electric motors, but may also use low-pressure steam.{{citation needed|date=October 2015}}