A Shipboard Tow Tractor towing an F-35B aircraft aboard the USS Essex (LHD-2). 

Shipboard Tow Tractor (STT)

The Shipboard Tow Tractor’s primary role is the handling of aircraft aboard the flight deck of naval ships (CVNs & LHA/LHDs).  In addition to maneuvering aircraft, the STT is required to provide a mobile platform and fuel source for the Jet engine Air Start Unit, MSU-200NAV.