HYDROACOUSTIC LONG-RANGE NAVIGATION SYSTEM Russian patent published in 1997 - IPC

FIELD: long-range submarines, in particular, ones which operate under ice. SUBSTANCE: device has bottom navigation network which has M submarine detectors with different response frequencies, submarine, which has synchronization unit, M-channel receiver, M+1 meters of acoustic signal spreading time, M N units which convert time intervals into distance according to possible track number N, M units for selection maximal value of distance, submarine coordinates calculation unit, acoustic signal request frequency emitter, receiver of synchronous distance meter with acoustic input for request frequency acoustic signal f_o. In addition submarine has M+1 spread time meters, M+1 unit which converts time intervals into distance, M+1 unit for selection of maximal value of distance, bearing and local angle measuring unit. Support ship has second synchronization unit which is synchronized against first one, second M-channel receiver which has acoustic input for response signals from submarine detectors, M modulators, M oscillators of response frequencies and emitter which has M+1 channels. EFFECT: increased functional capabilities. 2 dwg