Plain English Meaning

Machines on the ground that act like a real aircraft so pilots can practice flying safely without taking off.

Full Definition

Ground-based training devices that reproduce the cockpit environment, flight controls, instrument indications, and aircraft responses of a specific aircraft or aircraft type, allowing pilots to practice procedures, maneuvers, and emergencies without leaving the ground. Modern flight simulators range from basic desktop training devices to full-motion units approved by the FAA for logging flight time toward certificates and ratings.