FISHPOND

n. pond for ornamental fish; pond in which edible fish are raised

Fishpond was the  code name given to an extension to the H2S airborne radar system fitted to allied bombers during World War II. It was designed to give early warning of German night fighters approaching in the hemisphere below the carrying aircraft out to a range of 30 miles (48.2 km).The H2S radar was a navigational aid designed to give a map-like display of the ground below the aircraft. The display, known as a Plan Position Indicator (PPI), used a scanning electron beam in a Cathode Ray Tube which scanned from the centre of the display to the edge in a direction corresponding to the direction in which the radar's scanning head was pointing. In order that the centre of the display represented the ground immediately beneath the aircraft, the scan had to be delayed to allow for the transmitted radar pulses to travel from the aircraft to the ground and back again. This delay was derived from a simple radio altimeter.
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Noun
1. a freshwater pond with fish
(hypernym) pond, pool

Synonyms and related words:
aquarium, artificial lake, bayou lake, cistern, dam, dead water, dike, etang, farm pond, freshwater lake, glacial lake, inland sea, lagoon, laguna, lake, lakelet, landlocked water, linn, loch, lough, mere, millpond, millpool, nyanza, oxbow lake, plash, pond, pondlet, pool, puddle, reservoir, salina, salt pond, stagnant water, standing water, still water, sump, tank, tarn, terrarium, tidal pond, vivarium, volcanic lake, water hole, water pocket, well
  

fishpond
danh từ ao thả cá; ao cá
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