FIELD: rescue of victim in distress. SUBSTANCE: system includes life jacket with light source and transmitters with transmitting antennae, as well as receiver mounted at monitoring point. Receiver includes antenna 23-27, high-frequency amplifiers 28-32, heterodyne 3, mixer 34, intermediate- frequency amplifier 35, amplitude detector 36, delay line 37, subtraction unit 38, integration unit 39, division unit 40, reference voltage forming unit 41, comparison unit 42, computer unit 43, switch 44, multipliers 45- 48, narrow-band filters 49-52, phase-meters 53-56 and recording unit 57. EFFECT: enhanced reliability for finding persons in distress at sea. 4 dwg
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