A surface-search radar , sometimes more accurately known as a sea-surface-search radar or naval surveillance radar , is a type of military radar intended primarily to locate objects on the surface of lakes and oceans. Part of almost every modern naval ship, they are also widely used on maritime patrol aircraft and naval helicopters . When mounted on an aircraft, they are sometimes known, in British terminology, as air-to-surface-vessel radar — ASV for short. Similar radars are also widely used on civilian ships and even small pleasure craft, in which case they are more commonly known as marine radar .
3-617: The DMS-1000 was an experimental surface search radar developed by the MIT Radiation Laboratory and produced in limited numbers by Western Electric in late 1942. The first unit was sent to be used by the RAF Coastal Command in a Liberator GR and entered service in January 1943 under the name ASV Mark IV . Seven additional examples were received by June, sent to No. 224 Squadron RAF , where they were used operationally over
6-405: A surface-search radar is greatly increased compared to other roles due to several aspects of the sea surfaces and the objects in it. In low sea states , water makes an excellent reflector for radio signals, which helps maximize the signal strength as reflections off the water strike the targets in addition to the line-of-sight signal. Additionally, as the sides of ships generally rise vertically from
9-550: The Mid-Atlantic Gap . No more were produced and production switched to the similar AN/APS-2 for further deliveries, known in RAF service as ASV Mark V. This United States military article is a stub . You can help Misplaced Pages by expanding it . Surface search radar As with conventional surveillance radars, these systems detect objects from the reflections of radio signals off target objects, especially metal. The range of
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