FIELD: magnetic recording equipment. SUBSTANCE: device has detachable housing, armored cassette with receiving reel. Housing walls are made from three layers: external, middle and inner. Container also has three dielectric plates and three markers. Each marker has receiving-transmitting antenna, which operate at two frequencies: first frequency, and second one which is multiple to first one. In addition marker has non-linear element, which is connected to antenna. Markers are located inside dielectric plates, which are mounted in coaxial holes which are provided in external and middle layers of orthogonal walls of housing. EFFECT: possibility to detect container by helicopter-based radar. 4 dwg
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