The Naval Service is dominated by the Royal Navy, and operates primarily from three bases in the United Kingdom where commissioned ships are based; Portsmouth, Clyde and Devonport, the last being the largest operational naval base in Western Europe. As of 2019, there are over 186 vessels in service with the various branches of the Naval Service and supporting organisations, including; 77 commissioned ships of the Royal Navy, 33 landing craft of the Royal Marines, 63 auxiliary vessels of Marine Services and 13 auxiliary ships of the Royal Fleet Auxiliary. As of March 2019, Her Majesty's Naval Service employed a total of 40,600 personnel.