Underwater direction finding system

Details Underwater direction finding system Underwater direction finding system

1967-11-03

1976-10-19

Farley, Richard A.

Communications: electrical

Selective

Having indication or alarm

G01S 380

Patent

active

039874044

ABSTRACT:
An underwater direction finding system includes a pair of directional hydrophones and a compass in a novel arrangement which associates the signals from all three elements with a single subcarrier. Subsequent demodulation of the subcarrier signals in an airplane or ship then provides directional information directly referenced to the earth's magnetic coordinates.

REFERENCES:
patent: 2754493 (1956-07-01), Lippel
patent: 2837730 (1958-06-01), Snyder
patent: 2867788 (1959-01-01), Harry
patent: 3022462 (1962-02-01), Keiper, Jr.
patent: 3148351 (1964-09-01), Bartlett
patent: 3160850 (1964-12-01), Dudley
patent: 3176262 (1965-03-01), Ehrlich et al.

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