Ground speed
Encyclopedia : G : GR : GRO : Ground speed
Ground speed is the speed of an aircraft relative to the ground. It is the sum of the aircraft's true airspeed and the current wind and weather conditions; a headwind subtracts from the ground speed, while a tailwind adds to it. Winds at other angles to the heading will have components of either headwind or tailwind as well as a crosstrack component. Calculations of resulting ground speed are often done using an E6B flight computer.
See also
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