23 Apr 1943
The milkcow U-461 was attacked in the Bay of Biscay by a Leigh-Light equipped Canadian Wellington aircraft (Sqdn 172/M) with three bombs. The boat suffered slight damage and as a result left an oil trace.

30 Jul 1943
The sinking of U-461 A group of three outbound boats (U-461, U-462 and U-504) was sighted by the British Liberator aircraft BZ730 (53 Sqdn RAF/O, pilot F/O W.J. Irving) in the Bay of Biscay. Its sighting report brought up six other aircraft and the 2nd Escort Group was sent to the area. The aircraft from six different Squadrons had no radio contact with each other, so a coordinated attack was difficult. The Liberator of 53 Squadron decided to attack U-461, but its depth charges undershot and the heavy AA fire hit two engines, forcing the aircraft to land in Portugal where the crew was interned for a short time. However, the Australian Sunderland W6077 (461 Sqdn RAAF/U, pilot F/L D. Marrows, RAAF) had closely followed the attack of the Liberator and sank U-461. (Sources: Franks/Zimmerman)

2 recorded attacks on this boat.