Communications: electrical – Watercraft alarm or indicating systems – Navigation guides
Patent
1993-08-30
1995-09-05
Swarthout, Brent
Communications: electrical
Watercraft alarm or indicating systems
Navigation guides
340956, 342 54, G08G 300
Patent
active
054482356
ABSTRACT:
A method and system are provided for marking marine channels. A single laser beam is selectively interrupted to produce an identifying on/off laser beam sequence distinguishable by the human eye. The laser beam is then expanded in terms of beam diameter during specifically timed periods of laser beam transmission. The expanded laser beam is projected along a beam path that is substantially along the center of a marine channel to be marked at a height above the water's surface. The height of the beam path is selected such that marine traffic may pass under the beam path without obstructing same.
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"Glissada Laser Landing System", Sov. J. Quantum Electron., Jun. 1978, pp. 07-808.
O'Neill, Jr. Robert
Snow Judith B.
Lall Prithvi C.
McGowan Michael J.
Oglo Michael F.
Swarthout Brent
The United States of America as represented by the Secretary of
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