a system for aircraft navigation in which two signals sent from an aircraft are received and answered by two fixed transponders, the round-trip times of the signals enabling the navigator to determine the aircraft’s position.
a short-range radar system by which an aircraft, ship, etc, can accurately determine its position by the time taken for a signal to be sent to two radar beacons at known locations and be returned
noun 1. the land along the edge of a sea, lake, broad river, etc. 2. some particular country: my native shore. 3. land, as opposed to sea or water: a marine serving on shore. 4. Law. the space between the ordinary high-water and low-water mark. adjective 5. of, relating to, or located on land, especially […]
noun 1. any of various small, predaceous hemipterous insects of the family Saldidae, some of which are burrowers, commonly occurring along grassy shores of ponds, streams, brackish lakes, and seacoasts.
noun 1. any of numerous crabs that live along the shoreline between the tidemarks, as Hemigrapsus nudus (purple shore crab) of the Pacific coast of North America.
noun 1. a supporting post or beam with auxiliary members, especially one placed obliquely against the side of a building, a ship in drydock, or the like; prop; strut. verb (used with object), shored, shoring. 2. to support by or as if by a shore or shores; prop (usually followed by up): to shore up […]