FIELD: radio location equipment.
SUBSTANCE: device consists of omnidirectional antenna, receiver, four switches, two threshold units, three triggers, tunable filter, n-digit shift register, detector of k/n type, two circuits "AND", brightness indicator, two circuits "OR", sound indicator, timing pulses generator, frequency divider, digit counter, logical unit, two delay units, beam antenna, information processing unit, indicator of transmission line angular position, indicator of command "reverse", which are connected between each other in certain manner.
EFFECT: provision of helicopter flight safety on low heights.
2 cl, 2 dwg
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