Liverpool local area Auxiliary Patrol Area XVII—Lough Lame, Clyde local area–(North Coast of Ireland) Auxiliary Patrol Area XVIII—Lough Swilly Auxiliary Patrol Area XIX—Killybegs Auxiliary Patrol Area XX—Galway Bay Auxiliary Patrol Area XXI—Queenstown Auxiliary Patrol Area XXII—Holyhead Auxiliary Patrol Area XXIII–(?) Areas allocated by name Nore Auxiliary Patrol Area–(covering east of London and the mouth of the Nore) Harwich Auxiliary Patrol Area–(covering north of the Nore and off the coast of Harwich) Bristol Auxiliary Patrol Area–(covering the Bristol Channel) Mersey Auxiliary Patrol Area–(covering off mouth of the river Mersey) Clyde Auxiliary Patrol Area–(covering the mouth of the river Clyde) Patrol areas Mediterranean Sea The Mediterranean Sea was divided into patrol zones dividing responsibility between the British, French and Italian navies. British areas Auxiliary Patrol Area 1 (Mediterranean west) Auxiliary Patrol Area 5 (Mediterranean central) Auxiliary Patrol Area 8 (Aegean sea) Auxiliary Patrol Area 10 (East Mediterranean south of Crete, to the coast of Egypt) French areas Auxiliary Patrol Area 2 (Oran, east of and west of Sardinia and Corsica) Auxiliary Patrol Area 4 (Tunisia, eastern coast) Auxiliary Patrol Area 7 (Greece, Southwest) Auxiliary Patrol Area 9 (East Mediterranean) Italian Areas Auxiliary Patrol Area 3, (Tyrrhenian Sea) Auxiliary Patrol Area 6, (Adriatic sea) Auxiliary Patrol Area 11, (Gulf of Sidra) Sources Harley Simon, Lovell Tony, (2017), Admiral of Patrols, dreadnoughtproject.org, http://www.dreadnoughtproject.org. See also Dover Patrol Northern Patrol Royal Naval Patrol Service Trawlers of the Royal Navy References External links Royal Naval Patrol Service Association Harry Tate's Navy Royal Navy patrols Units and formations of the Royal Navy in World War I