Re: [PSUBS-MAILIST] UW-DGPS

["Paul Suds" <paul_suds@hotmail.com>]

Phil, You wrote:

Re: GPS . . .we use both the Trackpoint 2 and the older
Honeywell
Hydrostar tracking system on the DW2000's. You're right on the
mega$$ -
the TP2 is about 75K, all up - I like the Honeywell, so we still
use it -
it is super reliable and stable - cost about 50K.

Are you saying that you are able to use GPS underwater at some depth?
How does this system work as far as triangulating the signals at depth? I'm 
a little confused here. It was not really clear in your e-mail, how this 
system works. Do you use a surface unit to obtain the GPS data and then use 
sonics to dtermine the coordinates of the sub?
Please clarify. If GPS is possible underwater, and the system is not 
patented, I would be glad to build you a few for a lot less than 50K. Even 
if it is patented, thereare improvements that can be made to sny system to 
elevate the state of the art...Suds
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