Operation FB  Operation FB (29 October – 9 November 1942) took place as part of the Arctic Convoys of World War II. The operation consisted of independent sailings by unescorted merchant ships between Iceland and Murmansk. In late 1942, Allies had taken the offensive against Germany but the dispatch of supplies to the USSR by convoy via the Arctic route was suspended, due to the demands of the Mediterranean campaign. Convoy PQ 19 was cancelled because the Home Fleet diverted ships to the Mediterranean for Operation Torch (8–16 November 1942) which would have had to be postponed for three weeks had ships been provided for PQ 19. Discussions between the British Prime Minister Winston Churchill and the US President Franklin D. Roosevelt led to ships being dispatched independently to Russia from Iceland as a substitute for PQ 19, using the long, Arctic, winter night for concealment. The ships sailed at approximately twelve-hour intervals, with seven trawlers strung out along the routes as rescue ships. Of thirteen sailings to Russia, five arrived and of 23 independent departures from the USSR, 22 ships reached their destination. The outbound convoy series JW, began with Convoy JW 51A (15–25 December 1942), returns being called RW. In October 1941, after Operation Barbarossa, the German invasion of the USSR, which had begun on 22 June, the Prime Minister, Winston Churchill, made a commitment to send a convoy to the Arctic ports of the USSR every ten days and to deliver a month from July 1942 to January 1943, followed by and another more than already promised. The first convoy was due at Murmansk around 12 October and the next convoy was to depart Iceland on 22 October. A motley of British, Allied and neutral shipping loaded with military stores and raw materials for the Soviet war effort would be assembled at Hvalfjordur, Iceland, convenient for ships from both sides of the Atlantic. By late 1941, the convoy system used in the Atlantic had been established on the Arctic run; a convoy commodore ensured that the ships' masters and signals officers attended a briefing before sailing to make arrangements for the management of the convoy, which sailed in a formation of long rows of short columns. The commodore was usually a retired naval officer, aboard a ship identified by a white pendant with a blue cross. The commodore was assisted by a Naval signals party of four men, who used lamps, semaphore flags and telescopes to pass signals, coded from books carried in a bag, weighted to be dumped overboard.