Sonar system of the type using hollow conical beams

Details Sonar system of the type using hollow conical beams Sonar system of the type using hollow conical beams

1990-06-04

1991-06-04

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

By combining or comparing signals

367 88, G01S 1500

Patent

active

050220152

ABSTRACT:
Sonar apapratus which forms concentric hollow conical receiver beams having a common cone axis which is at a predetermined angle relative to the direction of travel of the apparatus as opposed to being coincident with it. A target indication received by a conical beam defines a circle upon which the target might lie. Multiple transmissions and detection of the target in other beams result in intersecting the circles to thereby limit the location of the target to one of two possible points, and one of which may be disregarded depending upon the operational mission.

REFERENCES:
patent: 4052693 (1977-10-01), Gilmour
patent: 4311391 (1982-01-01), Gilmour

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