Method of and system for detecting marine obstacles

Details Method of and system for detecting marine obstacles Method of and system for detecting marine obstacles

1979-10-16

1981-09-15

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

340 34, 356 5, 356152, 250342, 455604, 455606, G08G 302, G01C 308

Patent

active

042900433

ABSTRACT:
A marine obstacle avoidance system for and method of alerting a helmsman of a marine vehicle to the danger of maritime collision with floating and/or submerged objects. The system includes an optical transmitter, an optical receiver, and an alarm. The transmitter transmits an incident light beam towards the waterline, whereupon a reflected light beam and a refracted lightbeam are generated. An obstacle in the path of either the incident and/or reflected and/or refracted beams is detected by reflecting the light back towards the receiver which, in turn, sounds the alarm.

REFERENCES:
patent: 3604803 (1971-09-01), Kahn
patent: 3689156 (1972-09-01), Kerpchar
patent: 3752582 (1973-08-01), Troll et al.
patent: 3781111 (1973-12-01), Fletcher et al.
patent: 3812372 (1974-05-01), Wirtz et al.
patent: 3815994 (1974-06-01), Peckham
patent: 3900261 (1975-08-01), Wingate
patent: 4047023 (1977-09-01), Key et al.
patent: 4050819 (1977-09-01), Lichtman
patent: 4068222 (1978-01-01), Treviranus
patent: 4140060 (1979-02-01), Brenner

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