Ground Control Station. This is the computer system that is connected to the aircraft via a telemetry link, and allows the operator to control the aircraft.
Global Navigation Satellite System. A system that uses satellites to provide autonomous geo-spatial positioning. Typically used interchangably with GPS.
Inertial Measurement Unit. This measures the vehicles orientation, and velocity.
Line Of Sight. This refers to a straight line along which you have unobstructed vision.
Remote Control. This refers to the RC controller that allows the safety pilot to manually fly the aircraft, as well as select flight modes.
Telemetry Log. A log file of the telemetry data sent and recieved from the aircraft.
Vertical Take Off and Landing. An aircraft that can hover, takeoff and land vertically.
When in vertical flight the aircraft slowly turns the nose into the wind. This reduces the work the vertical motors have to do.