Marine speed log

Details Marine speed log Marine speed log

1982-05-14

1984-09-25

Goldberg, Gerald

Measuring and testing

Navigation

Ship's log

73183, G01C 2116, G01C 2110

Patent

active

044729669

ABSTRACT:
A marine speed log for providing an indication of the relative velocity of a vessel through water and an indication of the forward or reverse direction of travel. An output indication of total distance travelled can also be provided. The speed log is operable in both salt and fresh water without any change in calibration and incorporates a transducer having an air core. The speed log provides high sensitivity and high rejection of noise.

REFERENCES:
patent: 3431778 (1969-03-01), Lemon et al.
patent: 3693440 (1972-09-01), Olson
patent: 3940983 (1976-03-01), Greene

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