groundspeed
1groundspeed — [ground′spēd΄] n. the speed of an aircraft in flight relative to the ground it passes over …
2groundspeed — /grownd speed /, n. the speed of an aircraft with reference to the ground. Also, ground speed. [1915 20; GROUND1 + SPEED] * * * …
3groundspeed — n. g.s., speed of a flying aircraft relative to the ground it crosses in a given period of time …
4groundspeed — ground′speed or ground′ speed n. aer. the speed of an aircraft with reference to the ground Compare airspeed • Etymology: 1915–20 …
5groundspeed — noun the speed of an aircraft relative to the ground • Hypernyms: ↑speed, ↑velocity …
6Heading indicator — A heading indicator in a small aircraft. The heading indicator (also called an HI) is a flight instrument used in an aircraft to inform the pilot of the aircraft s heading. It is sometimes referred to by its older names, the directional gyro or… …
7Instrument landing system — The Instrument Landing System (ILS) is a ground based instrument approach system that provides precision guidance to an aircraft approaching a runway, using a combination of radio signals and, in many cases, high intensity lighting arrays to… …
8Dynamic soaring — is a flying technique used to gain energy by repeatedly crossing the boundary between air masses of significantly different velocity. Such zones of high wind gradient are generally found close to obstacles and close to the surface, so the… …
9Airspeed — is the speed of an aircraft relative to the air. There are several different measures of airspeed: indicated airspeed, calibrated airspeed, equivalent airspeed and true airspeed.It is measured within the flying aircraft with an airspeed indicator …
10Norden bombsight — The Norden bombsight at the Computer History Museum in Mountain View, California. This example does not have the associated autopilot attached …
