On 10 May 1942 the squadron was transferred to RAF Coastal Command along with the Wellington aircraft. From 14 May 1942 it based at RAF Tiree, from 13 June 1942 at RAF Dale. Apart from patrolling duties over the Bay of Biscay, seven crews took part in a thousand-aircraft raid at Bremen on 25/26 June 1942 (losing one crew). Several times Polish crews attacked U-boats and fought with German long-range aircraft. On 13 August 1942 the Squadron was credited with sinking a U-boat, though this was not confirmed post-war. On 2 September 1942 one Wellington inflicted damage to Italian "Reginaldo Giuliani" submarine. A noteworthy event was a skirmish of one Wellington with six German Junkers Ju 88 on 16 September 1942 over the Bay of Biscay; The Polish aircraft was badly shot, but managed to hide in clouds, and claimed one Ju 88 shot down. On 9 February 1943 one Wellington evaded attacks by four Ju 88 for nearly an hour until they ran out of ammunition, and escaped with two Polish crewmen injured; similar combat with four Ju 88 took place on 5 September 1943, without losses, in spite of 116 bullet holes found.