HMNZS Achilles (70) – Cruiser (River Plate 1939, Guadalcanal 1942-43, Okinawa 1945)
HMAS Adelaide (D47) – Cruiser (Pacific 1941-43, East Indies 1942)
HMS Adula (MQ) – Merchant Aircraft Carrier
HMS Ajax (22) – Cruiser (River Plate 1939, Mediterranean 1940-41, Matapan 1941, Greece 1941, Crete 1941, Malta Convoys 1941, Aegean 1944, Normandy 1944, South France 1944)
HMS Albatross (I22) – Accommodation Ship/Seaplane Carrier/Repair Ship (Atlantic 1939-42, Normandy 1944)
HMS Alexia (MP) – Merchant Aircraft Carrier
HMS Amastra (MD) – Merchant Aircraft Carrier
HMS Ameer (D01) – Escort – (Burma 1944-45, East Indies 1945)
HMS Ancylus (MF) – Merchant Aircraft Carrier
HMS Arbiter (D31) – Escort Carrier (Atlantic 1944)
HMS Archer (D78) Escort Carrier (Atlantic 1943-45, Biscay 1943)
HMS Arethusa (26) – Cruiser (Norway 1940-41, Malta Convoys 1941-42, Normandy 1944)
HMS Ariguani (F105) – Fighter Catapult Ship (Atlantic 1941)
HMS Argonaut – (61) – Cruiser (Arctic 1942, North Africa 1942, Mediterranean 1942, Normandy 1944, South France 1944, Aegean 1944, Okinawa 1945)