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Re: [PSUBS-MAILIST] RE: Underwater Navigation
Hi Submadmans
http://www.euronaut.org/content/gfx/old_projects/IMG_5942a.jpg
Side Scan Sonar and Seamap-navigation plotter now on Sgt.Peppers.
Emile and I did the job to install it last weekend.
And also install two new thrusters and divided the air compensation
system for the thrusters and the batterys in two seperate systems.
GPS Antenna on the bouy is required for seamap operation.
But we anyway travel sometimes with a bouy for the CB radio antenna.
Has anybody an idear how long we can extent the length the GPS Antenna cable ?
At the moment we have just 10 meter (33 feet)
But would like to have 100 meter (333feet)
Regrads Carsten
"Brent Hartwig" <brenthartwig@hotmail.com> schrieb:
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> I remembered seeing the below data from the people that now operate the S103 Lula. Here is the link.http://www.rebikoff.org/html/uw_navigation.html
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> Navigation/GIS
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> "Submarine
> LULA is operated in conjunction with a precise underwater navigation
> system. This is particularly important when doing archaeological work,
> so as to be able to define the exact geographical position of a wreck
> or archaeological site and to refind the location in follow-up dives.
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> system used is a “long baseline system” (LBL). The system functions
> with several transmitters/receivers which communicate via high
> frequency acoustic signals and calculate the submarine´s position
> underwater.
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> The
> transmitter/receiver mounted on the submarine is connected to a
> notebook computer in the interior of the cabin and shows the
> submersible´s position and depth with a precision of 1 meter at all
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> By importing a sea chart into the system, the submarine´s geographical position can be displayed on a sea chart.
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> distance sailed underwater is logged automatically. Later on, this
> data, can be superimposed on a sea chart to make the actual underwater
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> Regards,
> Brent Hartwig
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> Date: Tue, 15 Jan 2008 10:29:16 -0700
> From: antoine.delafargue@gmail.com
> To: personal_submersibles@psubs.org
> Subject: Re: navigation was Re: [PSUBS-MAILIST] teathers
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> For navigation near the bottom, I think another (expensive) solution is a doppler sonar:
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> the change in the signal frequency after it bounces on the bottom is translated into a speed relative to it. 3 orthogonal beams give the full velocity vector.
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> I am not sure but I guess it is used by AUVs, ROVs, dynamically positioned boats, navy seals...
> A mixed task of mapping and positioning can be done too (cf Bill Stone experiments in Florida and with the AUV depthX)
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> Antoine
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