Marine depth sounding apparatus

Details Marine depth sounding apparatus Marine depth sounding apparatus

1979-01-18

1980-09-30

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367106, 367116, 367910, 340 29, G01S 968

Patent

active

042259525

ABSTRACT:
A marine depth sounding apparatus including a floatable housing carrying a sonic transducer for emitting sound waves toward the bottom of a body of water and for detecting the reflections of such sound waves, and a sound transmitter for emitting an audible signal when the information provided by the sonic transducer indicates that the depth of the water is less than a predetermined depth. The apparatus may be cast away from the vessel to provide information concerning the depth of water at locations remote from the vessel. A circuit is disclosed for comparing the time period required for sound waves to travel a distance corresponding to the predetermined depth with the actual time elapsed between the emitting of the sound waves by the sonic transducer and their detection by the sonic transducer.

REFERENCES:
patent: 2253975 (1941-08-01), Guanella
patent: 2821805 (1958-02-01), Kunze
patent: 3018839 (1962-01-01), Isaacson
patent: 3351895 (1967-11-01), Cupp et al.
patent: 3764962 (1973-10-01), Bartel, Jr.
patent: 3793618 (1974-02-01), Plangger

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