Radar Screen

Radar displays indicate the presence and movement of objects out of the range of vision, which is particularly useful for navigators. Electronic equipment records the behaviour of radio waves projected by the vessel; waves which do not encounter anything simply disperse, while waves bounced back reveal the shape and position of all objects in the region. The characteristic sweep of the radar display occurs because the area is continually reassessed for new information, and the screen is reprinted in response.

U.S. Air Force

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Navigation; Radar

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