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angular distance above the horizon (especially of a celestial object) ALT , altitude , EL , elevation
(physics) the angle that a magnetic needle makes with the plane of the horizon angle of dip , dip , inclination , magnetic dip , magnetic inclination
navigational instrument based on a gyroscope; it artificially provides a simulated horizon for the pilot artificial horizon , flight indicator , gyro horizon
(astronomy) the rising of a star above the horizon ascension
position of aircraft or spacecraft relative to a frame of reference (the horizon or direction of motion) attitude
immediately below the A-horizon; contains deposits of organic matter leached from surface soils B-horizon , B horizon
beneath the B-horizon and above the bedrock; consisting of weathered rock C-horizon , C horizon
great circle on the celestial sphere whose plane passes through the sensible horizon and the center of the Earth celestial horizon , horizon
star that does not go below horizon circumpolar
navigation by the horizon or landmarks, aircraft contact flight , contact flying
flight by visual observation of horizon and landmarks contact flight , contact flying
(astronomy) a heavenly body's highest celestial point above an observer's horizon culmination
angular distance below the horizon (especially of a celestial object) depression
position at right angles to the horizon erectness , uprightness , verticality , verticalness
bright flashes of light near the horizon without thunder (especially on hot evenings); usually attributed to distant lightning that is reflected by clouds heat lightning
level or parallel to horizon horizontal
flat and parallel to horizon horizontal
maximum parallax observed when the celestial body is at the horizon horizontal parallax
quality of being parallel to the horizon horizontality
instrument showing the angle that an aircraft makes with the horizon inclinometer
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