support vessels no relation the Coast Guard
The Royal Norwegian Navy (Norwegian: Sjøforsvaret, lit. 'Sea defence') is the branch of the Norwegian Armed Forces responsible for naval operations of Norway. As of 2008, the Royal Norwegian Navy consists of approximately 3,700 personnel (9,450 in mobilized state, 32,000 when fully mobilized) and 70 vessels, including 4 heavy frigates, 6 submarines, 14 patrol boats, 4 minesweepers, 4 minehunters, 1 mine detection vessel, 4 support vessels and 2 training vessels. It also includes the Coast Guard.
This 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, all its naval vessels since 1946 bear ship prefix "KNM", Kongelig Norske Marine (which accurately translates to Royal Norwegian Navy/Naval vessel). In English, they are permitted still to be ascribed prefix "HNoMS", meaning "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 permissibly, and less ambiguously in English, are styled "NoCGV", Norwegian Coast Guard Vessel.