Secret depth sounder

Details Secret depth sounder Secret depth sounder

1959-04-03

1978-04-25

Farley, Richard A.

Communications: electrical

Selective

Monitoring in addition to control

343100CL, G01S 966

Patent

active

040865606

ABSTRACT:
1. The method of measuring depth of a body of water comprising the steps of ecording the natural ambient noises at the location where the depth is to be measured, projecting the recorded noises back into the surrounding body of water, receiving the reflection of said projected recorded noises, and correlating the reflected noises with the projected recorded noises delayed in time.

REFERENCES:
patent: 2253975 (1941-08-01), Guznellz
patent: 2688124 (1954-08-01), Doty et al.
patent: 2800654 (1957-07-01), De Rosa
patent: 2907400 (1959-10-01), Swafford
patent: 2981927 (1961-04-01), McKenney

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