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From: onymouse@netcom.COM (John Debert)
Newsgroups: sci.electronics
Subject: Re: Data xfer UNDERWATER !
Message-ID: <1991Mar24.054427.11181@netcom.COM>
Date: 24 Mar 91 05:44:27 GMT
References: <10286@exodus.Eng.Sun.COM>
Organization: Netcom - Online Communication Services  UNIX System {408 241-9760 guest}
Lines: 21

From article <10286@exodus.Eng.Sun.COM>, by bender@oobleck.Eng.Sun.COM (I want to be eating rich soup in another town):
> In article <430.27e07fdb@brb.isnet.inmos.co.uk> robw@brb.isnet.inmos.co.uk writes:
> ->I need to transmit some data between two systems about 10 feet apart
> ->without being physically connected.  
> ->They will not always be line-of-sight, and they may be UNDERWATER !
> 
> How about something like sonar, i.e. use sound?  I don't know what the
> propagation delay would be, and what kind of data rates you would get.  Or
> how about low-power FM?  Or, magnetic induction - you should be able to get

Will any part of them always be in water? if so, how much? 

What is meant by "not always be line-of-sight?"

The answers to the above will determine what method of communication would 
best.


-- 
jd
onymouse@netcom.COM