PQ 17 was the code name for an Allied World War II convoy in the Arctic Ocean. In July 1942, the Arctic convoys suffered a significant defeat when Convoy PQ 17 lost 24 of its 35 merchant ships during a series of heavy enemy daylight attacks which lasted a week. On 27 June, the ships sailed eastbound from Hvalfjord, Iceland for the port of Arkhangelsk, Soviet Union. The convoy was located by German forces on 1 July, after which it was shadowed continuously and attacked.