What does GPU stand for in aviation terminology?

• A. Ground Power Unit
• B. Generator Power Unit
• C. Global Power Unit
• D. Ground Propulsion Unit

Answer: (A)

Ground Power Unit is a ground-based device that provides electrical power to an aircraft while it’s on the ground. It powers lights, avionics, climate control, and starting systems without needing the aircraft to run its engines or use its on-board APU, saving fuel and reducing noise. GPUs are commonly connected at gates or on the ramp and typically supply 400 Hz electrical power (and sometimes DC) to match the aircraft’s electrical needs. The other terms aren’t used for this purpose in aviation.