Other shortages included only a three-week supply of coal remaining for the sea transport tasks and only a ten-day supply for rail transports to move troops to the front, with fuel being at its lowest levels since the war began. In addition to the "Goya", "Wilhelm Gustloff", and "General von Steuben", 158 other merchant vessels were lost during the 15-week course of Operation Hannibal (January 23 – May 8, 1945).