Emergency speed

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Emergency Speed

Emergency speed is the maximum possible attainable power the vessel can make, and signifies this speed is to be reached at the fastest possible rate. Emergency speed is to be used only in extreme conditions, as it can result in significant overloads of the propulsion system. This is essentially a naval concept. Emergency speed may be used alternatively with flank speed in some regards, however emergency speed exceeds design margins and thus can be considered as beyond flank speed.

Dangers and Caveats

  • Overheating or failure of main engines as they are driven beyond their rated revolutions or pressures.
  • Cavitation of propellers.
  • Failure of gearboxes (see HMCS Kootenay) or shaftline bearings.
  • Extreme fuel consumption

See Also

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