Underwater sensing mechanism and method

Details Underwater sensing mechanism and method Underwater sensing mechanism and method

1981-10-26

1983-08-23

Woodiel, Donald O.

Measuring and testing

Navigation

Ship's log

73187, 340852, G01C 2110

Patent

active

043996957

ABSTRACT:
A water speed sensing transmitter unit suspended from a fishing boat at the depth fishing gear is being trolled actuates transmission of a pulse signal through the water for detection by a receiver unit mounted on the boat. The frequency of the pulse signal is proportional to the speed of the transmitter unit relative to surrounding water at the trolling depth. The receiver unit recreates a corresponding pulse signal, averages it and triggers a display of the average speed sensed by the transmitter unit over a predetermined period.

REFERENCES:
patent: 3038143 (1962-06-01), Dow
patent: 3566345 (1971-02-01), De Souza Large et al.
patent: 3706224 (1972-11-01), Overs
patent: 4159644 (1979-07-01), Svals
patent: 4315326 (1982-02-01), Chase

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