Communications: electrical – Selective – Path selection
Patent
1965-10-22
1976-09-21
Farley, Richard A.
Communications: electrical
Selective
Path selection
340 6R, G01S 966
Patent
active
039822222
ABSTRACT:
A string of hydrophone units, each unit being positioned at a different pelected depth and having sensors arranged so as to receive sound waves emanating from vessels positioned within an annular zone defined by a conical pencil of rays upwardly-divergent or downwardly-divergent from each unit.
REFERENCES:
patent: 2838741 (1958-06-01), Mason
Farley Richard A.
The United States of America as represented by the Secretary of
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