SYSTEM FOR DETECTION AND DETERMINATION OF THE POSITION OF A MAN IN DISTRESS ON WATER Russian patent published in 2006 - IPC B63C9/20 

FIELD: the invention refers to rescuing technique.

SUBSTANCE: the system for detection and determination of the position of a man in distress on water has dressed on the man a life-saving jacket with a source of light and transmitters with transmitting antennas and a receiver-direction finder installed aboard a helicopter. The receiver-direction finder has receiving antennas 23-25, frequency changers 26, 27, 29, 40 and 61, amplifiers 30, 31, 34 and 62 of the first intermediate frequency, commutators 32, 33, 37 and 65, narrow band filters 35, 36, 44, 51, 54 and 39, an amplifier 41 of the second intermediate frequency, amplitude detectors 42, 67, 74 and 75, phase detectors 45 and 79, phase meters 46 and 47, an integrator 49 of standard voltage, a frequency meter 50, phase inverters 52, 55 and 58, summing units 53, 56, 59 and 64, phase rotators 60 and 63 on 90⁰, a calibrator 69, regulated phase rotators 70 and 71, inverse amplifiers 78 and 81, a subtracting unit 76, filters 77 and 80 of the lower frequencies.

EFFECT: increases antijamming capability and selectivity of an airborne receiver-direction finder.

7 dwg