Armored citadel

In a warship an armored citadel is an armored box enclosing the machinery and magazine spaces, formed by the armored deck, the waterline belt, and the transverse bulkheads.[1] In many post-World War I warships armor was concentrated in a very strong citadel, with the rest of the ship virtually unprotected, which was found to be the most effective defence; this is referred to as all or nothing armor.

A schematic of HMS Inflexible depicting her rectangular citadel in the centre

In a non-military ship a citadel is a secure space equipped with means of communication and emergency supplies, used typically in case of piracy.[2]

Citations
  1. Raven and Roberts, p. 9
  2. "Crew of heavy-lift ship freed after hijacking". professionalmariner.com. Professional Mariner. 7 May 2019.

Bibliography
  • Raven, Alan; Roberts, John (1980). British Cruisers of World War Two. Annapolis, MD: Naval Institute Press. ISBN 0-87021-922-7.
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