Communications: electrical – Selective – Monitoring in addition to control
Patent
1967-10-03
1976-03-09
Farley, Richard A.
Communications: electrical
Selective
Monitoring in addition to control
G01S 968
Patent
active
039434826
ABSTRACT:
A sonar system for detecting and identifying objects laying on or submerged n a sea floor having a dual frequency transmitter and a dual frequency receiver for timely broadcasting and receiving a pair of relatively high and low frequency acoustical signals, respectively, in accordance with a predetermined timing program which facilitates the display and interpretation thereof.
REFERENCES:
patent: 2817832 (1957-12-01), Mathes
patent: 2994060 (1961-07-01), Ross
patent: 3212053 (1965-10-01), Finney
patent: 3307142 (1967-02-01), Doebler
McLeroy, Jr. Edward G.
Murphree Francis J.
Warner Henry L.
Doty Don D.
Farley Richard A.
Miller Louis A.
Sciascia Richard S.
The United States of America as represented by the Secretary of
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