List of active Royal Navy ships
The Royal Navy is the principal naval warfare service branch of the British Armed Forces. As of April 2022, there are 72 commissioned ships in the Royal Navy. Of the commissioned vessels, twenty-two are major surface combatants (six guided missile destroyers, twelve frigates, two amphibious transport docks and two aircraft carriers), and nine are nuclear-powered submarines (four ballistic missile submarines and five fleet submarines). In addition the Navy possesses eleven mine countermeasures vessels, twenty-four patrol vessels, four survey vessels, one icebreaker and one historic warship, . The total displacement of the Royal  Navy is approximately 428,500 tonnes. The Royal Navy operates four bases where commissioned ships are based: HMNB Portsmouth, HMNB Devonport and HMNB Clyde and the Royal Navy's newest base, in Bahrain. In addition, a number of commissioned vessels belonging to the University Royal Naval Units (URNU) are stationed at various locations around the United Kingdom, and two patrol vessels form part of the Gibraltar Squadron and are permanently based there. Besides the Royal Navy, the Royal Fleet Auxiliary (RFA) and the Royal Marines operate their own flotillas of vessels which complement the assets of the Royal Navy, however they  are not included in this list or the above figures (the Royal Navy and RFA combined have 83 vessels with a total displacement in excess of 760,500 tonnes). In addition, the naval training vessels and can be found based at the Royal Navy shore establishment and the Britannia Royal Naval College, respectively, along with a number of P1000s and Motor Whalers. As a supporting contingent of Her Majesty's Naval Service, the civilian Marine Services operate many auxiliary ships (including coastal logistics, tugs and research vessels) in support of Royal Navy and Royal Fleet Auxiliary operations. (with a total displacement  in excess of 815,000 tonnes). All ships and submarines currently in commission with the Royal Navy were built in the United Kingdom, with the exceptions of icebreaker which was built in Norway and survey vessel which was substantially built in Ireland. All vessels of the Royal Navy bear the ship prefix "HMS", for Her Majesty's Ship or Her Majesty's Submarine. Silhouettes. Silhouettes of major fleet units: