aboard the escort carrier to serve on convoy escort duty in the battle of the Atlantic. On 22 April Biter and the escort destroyers , , and joined convoy ONS-4 sailing from Liverpool. On 25 April a Swordfish from 811 Squadron attacked , which was then sunk by depth charges by Pathfinder. The convoy arrived at Halifax, Nova Scotia, on 5 April without loss. From 2 May Biter defended the convoys HX 237 and SC 129 from German wolf packs. On 12 May a Swordfish from 811 Squadron, with the destroyer and the frigate , attacked and sank . After arriving at Liverpool, the squadron disembarked and were stationed at RNAS Machrihanish (HMS Landrail). On 2 June 811 Squadron returned to Biter to escort further convoys between Liverpool and Halifax, including ON-207 in October. While at Naval Station Argentia in November, the squadron was supplied with the new American acoustic torpedo, codenamed the Mark 24 mine, but commonly known as "FIDO". On 17 November a Swordfish smashed into the end of the flight deck of Biter while landing in a heavy swell, and its unused FIDO torpedo fell into the sea and exploded, badly damaging Biters rudder. The carrier managed to return to Rosyth Dockyard for repairs, which took a month. While Biter was under repair 811 Squadron were stationed at RNAS Inskip (HMS Nightjar), finally returning to the ship on 12 January 1944. In early February Biter sailed in support of Convoy ONS-29 to Halifax, then transferred to Convoy OS-68/KMS-42 bound for Freetown and Gibraltar. On 16 February, in the Bay of Biscay, 811's Martlets shot down a Ju 290 long-range reconnaissance aircraft, which had attempted to attack the convoy escorts with a glide bomb. Biter arrived at Gibraltar on 25 February where two Swordfish of 811 Squadron spent a week operating out of RAF North Front. On 2 March Biter sailed again, escorting the UK-bound convoys SL-150 and MKS-41, and arrived at Liverpool on the 13th. Biter continued to escort convoys between the UK and Gibraltar until August 1944 when she was withdrawn from service, for conversion to a transport carrier. 811 Squadron was temporarily based at RAF Limavady in Northern Ireland, serving under RAF Coastal Command, until joining in September 1944 to escort convoys to Russia. 811 Squadron was disbanded on its return in December 1944. Post war The squadron was reformed in September 1945, and in