The Royal Norwegian Navy(RNoN) (Norwegian: Sjøforsvaret, «the naval defence (forces)») is the branch of the Norwegian Armed Forces responsible for naval operations of the state of Norway. The navy also includes the Coast Guard.
The Royal Norwegian Navy has a history dating back to 955. From 1509 to 1814, it formed part of the navy of Denmark-Norway, also referred to as the «Common Fleet». Since 1814, the Royal Norwegian Navy has again existed as a separate navy.
In Norwegian, Royal Norwegian Navy vessels have since 1946 been given the ship prefix «KNM», short for Kongelig Norske Marine (Royal Norwegian Navy). In English, they are given the prefix «HNoMS», short for «His/Her Norwegian Majesty's Ship» («HNMS» could be also used for the Royal Netherlands Navy, for which «HNLMS» is used instead). Coast Guard vessels are given the prefix «KV» for KystVakt (Coast Guard) in Norwegian and «NoCGV» for Norwegian Coast Guard Vessel in English.