Set designed for use on battleships that were still equipped with cage masts in 1941 such as the Maryland and California class ships or the Nevada and Pennsylvania classes after their early 1930s modernizations. It contains the deck catapults used on all these ships and the turret catapult used on Arizona and the Maryland and California class ships, boat crane booms for those ships and Nevada and more. Brass cage masts for the Maryland and California class ships are included as is the CXAM and CXAM-1 radar antennas mounted on California, Pennsylvania and West Virginia during the attack on Pearl Harbor. For supporting sets see 704 rails, 753 Naval Doors, 754 inclined ladders & 759 deck details