No. 461 Squadron was formed at RAF Mount Batten in Britain on 25 April 1942 as an anti-submarine squadron. Equipped with Short Sunderland aircraft the Squadron began flying operational anti-submarine patrols over the Atlantic in July. While some of No. 461 Squadron's aircrew had previously served with No. 10 Squadron RAAF most of the aircrew were inexperienced and required further training and flight experience. No. 461 Squadron encountered its first U-Boat in September but was not successful in sinking any submarines during 1942. The Squadron flew a number of transport flights to Gibraltar in October in support of Operation Torch. During 1943 No. 461 Squadron mainly conducted daylight anti-submarine patrols over the Bay of Biscay. These patrols exposed the Squadron's aircraft to frequent attacks by German fighters. The Sunderland aircraft were fitted with a heavy defensive armament, however, and were often successful in beating off fighter attacks. During 1943 the Squadron sank a total of three submarines and damaged several other submarines. By May 1943 No. 461 Squadron was fully equipped with the more advanced Mark III Sunderland. This aircraft allowed the Squadron to operate at night. Equipped with these improved aircraft the Squadron continued to fly anti-submarine patrols over the Atlantic, including patrols in support of the Allied landing in Normandy. During 1944 the squadron sank three submarines and damaged a further three.
Following the liberation of France the numbers of German U-boats in the Atlantic declined and No. 461 Squadron made few contacts with the enemy between October 1944 and the end of the war. No. 461 Squadron was disbanded at Pembroke Dock on 4 June 1945.
During the war No. 461 destroyed a total of six German submarines. These submarines were:
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