Aeronautics. A known landmark seen and identified from an aircraft; the ground position of an aircraft as determined from such a sighting.
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| 释义 | society > travel > air or space travel > action of flying (in) aircraft > navigation of course of aircraft > [noun] > course > check-point or way-point (4) pinpoint1927 Aeronautics. A known landmark seen and identified from an aircraft; the ground position of an aircraft as determined from such a sighting. check-point1940 (a) Aeronautics (see quot. 1940); (b) a place (entrance, turnstile, barrier, etc.) where the movement of traffic, pedestrians, etc., is checked… waypoint1969 Originally: the destination point of each leg of a long flight; the coordinates of any such point, esp. as generated and checked by a computerized… Subcategories:— limit when first of three engines fails (1) |
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