Re: [PSUBS-MAILIST] UW-DGPS

[Dave Everett <deverett@idx.com.au>]

At 19:21 18-03-00 EST, VBra676539@aol.com wrote:
>Carsten & Pat,
>
>I know there is an integral system on the market, PC driven, which connects 
>the GPS link and an acoustic link from a tracking system by computer and
then 
>tells everybody where everybody is. Trust me, we can't afford it. Woods Hole 
>uses it, and IFREMER, but not Harbor Branch (too many $$$).
>
>I have used radios, both VHF and CB to about 50 fsw, but not deeper. There 
>has to be a way to convert the GPS signal to acoustic and broadcast to the 
>sub, but all that stuff was mighty Flash Gordon in my operational day. Maybe 
>Phil will read this and chip in. He uses computers to control the DWs, and 
>will be up to snuff on current events along these lines (if there are any).
>
Unfortunately I don't think it's likely in the enthusiast market. You
actually need to receive the satellite signals in order to determine your
position, not a relay at a different frequency, and all that would do is
tell you where your relay was.

I think the only way for us to that at the moment is to surface and take a
GPS bearing from time to time while plotting an assumed position underwater.

I'm sure there is a part of GPS that can be used by submerged vessels, but
I don't think we'll ever get to use it.

Dave Everett.