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From: bryan@marlin.NOSC.MIL (Dale Bryan)
Newsgroups: comp.dcom.modems
Subject: novice at modems
Message-ID: <1731@marlin.NOSC.MIL>
Date: 27 Mar 91 16:37:17 GMT
Organization: Naval Ocean Systems Center, San Diego
Lines: 17


	I am currently working on a project whereby data communications
	between two computers is accomplished through the ocean.  One 
	computer is on a ship and the other is on an underwater robotic
	submersible.  The ocean makes a lousy acoustic channel for high
	speed (>4800 bps) throughput due to ambient noise, reverberation,
	multipath, and doppler shifting.  What I am looking for is direction
	on what kind of modems are available today and/or what modem technology
	is able to do today.  I don't know much about modems, but I thought
	some of these issues may be addressed in the radio/cellular modem
	arenas.  The present acoustic data communications link uses a Rockwell
	R24 (2400/1200 bps) modem vintage 1980.  Does anyone have any
	suggestions for a better modem replacement? 

	Dale Bryan
	619-553-1902
	email: bryan@marlin.nosc.mil