The M548 is a tracked vehicle based on the M113 APC and was developed on 1965. It was designed to be a tracked amphibious cargo carrier. They have a payload of 5.45 tons and has room for 1 driver and 3 passengers in the cab and 4 in the cargo area. One of the duties of the M548 was as a support vehicle to the M110 self propelled howitzer. The M548 tracked carrier can be armed with an over cab pintle mounted .50 cal or 7.62mm machine gun.