67 lines
2.7 KiB
Plaintext
67 lines
2.7 KiB
Plaintext
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(word processor parameters LM=8, RM=75, TM=2, BM=2)
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Taken from KeelyNet BBS (214) 324-3501
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Sponsored by Vangard Sciences
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PO BOX 1031
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Mesquite, TX 75150
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There are ABSOLUTELY NO RESTRICTIONS
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on duplicating, publishing or distributing the
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files on KeelyNet!
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December 20, 1990
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DIVE1.ASC
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Acoustic Diver Beacons
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University of Florida researchers investigating underwater
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communication systems have discovered that the sound "sshhh", when
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played through underwater speakers, enables divers to find their way
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home, even from GREAT DEPTHS and in DARK, MURKY WATER.
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Researchers James Hicks and Harry Hollien, of the Institute for
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Advanced Study of the Communication Processes, discovered that this
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sound played underwater can be heard by divers from AS FAR AWAY AS
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500 FEET.
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Three or more underwater speakers are arranged in a line projecting
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from home base to emit their signal in sequence, much like the
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flashing runway lights at airports. The stereo effect from this
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pattern guides the divers back to home base.
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The underwater ACOUSTIC BEACON is much more reliable than underwater
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compasses and electronic instruments ordinarily used for underwater
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navigation.
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The technique should prove helpful to divers working from surface
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ships, oil rigs, or submarines and underwater habitats. Various
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types of underwater speakers and arrangements have been tested to
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further extend the range.
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If you have comments or other information relating to such topics
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as this paper covers, please upload to KeelyNet or send to the
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Vangard Sciences address as listed on the first page.
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Thank you for your consideration, interest and support.
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Jerry W. Decker.........Ron Barker...........Chuck Henderson
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Vangard Sciences/KeelyNet
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If we can be of service, you may contact
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Jerry at (214) 324-8741 or Ron at (214) 242-9346
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