A ground power unit (GPU) is a vehicle capable of supplying power to aircraft parked on the ground. Ground power units may also be built into the jetway, making it even easier to supply electrical power to aircraft.
Firefighting Vehicles also known as fire fighting trucks and fire engines are designed to assist in fighting fires by transporting firefighters and fire fighting equipment to the scene of fire or other emergency.
In aviation, pushback is an airport procedure during which an aircraft is pushed backwards away from an airport gate by external power. Pushbacks are carried out by special, low-profile vehicles called pushback tractors or tugs.
Hydraulic Ground Power Unit – Hydraulic power units, sometimes called a hydraulic mule, provide hydraulic pressure to operate the aircraft systems during maintenance. They can be used to: ... Operating at pressures of 3,000 psi or more, extreme caution must be used when operating hydraulic power units