Method and apparatus for locating position in a waterway

Details Method and apparatus for locating position in a waterway Method and apparatus for locating position in a waterway

1977-07-07

1978-09-26

Farley, Richard A.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 15, 343112R, G01S 904

Patent

active

041174828

ABSTRACT:
An electromagnetic energy pulse-echo system combined with a data processing unit and a memory storing the locations of a number of fixed echo reflectors relative to a waterway so that the pulse-echo system operating from a boat can register the echo reflectors and positions in the waterway can be calculated by the data processing unit.

REFERENCES:
patent: 3181146 (1965-04-01), Huckabay et al.
patent: 3181155 (1965-04-01), Huckabay et al.
patent: 3270345 (1966-08-01), Schauffler
patent: 3289207 (1966-11-01), Lent
patent: 3422427 (1969-01-01), Schauffler

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