The M548 is a tracked cargo carrier. It is based on the M113 armored personnel carrier, and was built by FMC Corp. Its light weight allows the use of a relatively small engine to power the vehicle, a 6V53 Detroit 2-stroke six cylinder diesel, with an Allison TX-100-1 3-speed automatic transmission, and allows the vehicle to carry a large payload cross-country and to be transported by fixed- and rotary-wing aircraft.