sentences:  Returning to San Francisco, California, to load explosives, "Castor" arrived in Pearl Harbor three days before the Japanese attack of 7 December 1941.Her guns were quickly brought into action, and while she was repeatedly strafed by enemy planes, she suffered little damage and no casualties in the attack.Until 7 February 1942, "Castor" carried cargo from the U.S. West Coast to aid in the buildup of Pearl Harbor as the nerve center for the Pacific Ocean, then aided in the opening of operations in the critical South Pacific area with cargo runs from San Francisco to bases in New Caledonia, the New Hebrides, the Fiji Islands, and New Zealand.