LVT-3, with the first machines going into action at Saipan in June 1944. Sea Serpent The Sea Serpent was designed by the 79th Armoured Division for use by the British in the Far East. Its armament was two "Wasp" flamethrowers and a machine gun. These would have been used by the "flame battery" of the 34th Amphibian Support Regiment, Royal Marines in any assault on the Japanese mainland but the war ended before they were used. LVT(A)-3 Developed as a version of the LVT-4 with armor built in but never approved for production. LVT-3 Bushmaster Developed by the Borg Warner Corporation as their Model B in April 1943. To allow for rear loading, the engines were moved to the sponsons and a ramp installed in the rear, and the cargo area was slightly wider to provide room for a Jeep to be carried in the cargo hold. Some received armor kits. First used in combat in Okinawa in April 1945. The twin Cadillac V-8 petrol engines were connected by driveshafts to the transmission (the same as the M5 light tank) in the front of the hull. It could carry a payload of or 30 fully armed soldiers. 2,962 units produced, with many remaining in US service until 1955 when they were finally superseded by the LVTP-5. It performed with efficiency and greater reliability, as more maintenance time was generally available than during World War II. The LVT(3)C remained standard with the Marine Corps until the introduction of the first major post—war design, the LVT(P)5, in 1953. Overall weight of the craft was , and its maximum speed was on land or on water, with an operational range of on land or on water. LVT(A)-4 The 37 mm gun of the LVT(A)-1 was inadequate for fire support version so the turret of the 75 mm Howitzer Motor Carriage M8armed with a 75 mm howitzerwas used to produce the LVT(A)-4. In some cases, the 75 mm was replaced with the Canadian Ronson flamethrower. A single .50 cal machine gun was installed on the ring mount above the turret rear. In late production vehicles, the heavy machine gun was replaced with two .30 caliber M1919A4 machine guns on pintle mounts on the sides of the turret, and one more in the bow. 1,890 units produced, with 1,307 were transferred to the US Army and 50 to the British Army. The hull was armoured