Communications: electrical – Selective – Having indication or alarm
Patent
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.
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Caldwell Sr. John W.
Crosland Donnie L.
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