marine - aviation - land - space exploration

@allah3 (171)
August 13, 2007 12:50pm CST
Radar is something that is in use all around us, although it is normally invisible. Air traffic control uses radar to track planes both on the ground ground and in the air, and lso to guide planes in for smooth landings.
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@allah4 (25)
• India
13 Aug 07
i also accept with yor invitation... radar has more nos of importance