Depthsounder/fish finder

Details Depthsounder/fish finder Depthsounder/fish finder

1983-10-17

1986-06-24

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

367108, 367112, G01S 1596, G01S 766

Patent

active

045970696

ABSTRACT:
A depthsounder for selectively measuring either bottom depth or the depth of any fish located beneath a vessel. When operating in a depth mode, the depthsounder automatically adjusts the gain of its receiver to minimize interference and provide a filtered display of bottom depth. When operating in a fish finding mode, the depthsounder likewise automatically adjusts the gain of its receiver to minimize interference in its detection of fish. In addition, the depthsounder suitably processes any return pulses to distinguish those produced by fish from those produced by other objects in the water. When fish are detected, the depthsounder provides a visual display of their depth and an aural alarm whose repetition rate is proportional to the number and size of the fish.

REFERENCES:
patent: 2721987 (1955-10-01), Richard
patent: 3297980 (1967-01-01), Haslett
patent: 3332056 (1967-07-01), Drenkelfort
patent: 3417369 (1968-12-01), Richard
patent: 3500302 (1970-03-01), Moss, Jr. et al.
patent: 3539978 (1970-11-01), Stedtnitz
patent: 3805224 (1974-04-01), Wenz
patent: 4188608 (1980-02-01), Richard
patent: 4225951 (1980-09-01), Menin et al.

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