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Re: [PSUBS-MAILIST] sunken ferry update
ya, very cool. thanks. and the article that was
uploaded was good too.
-D. Cutajar
--- "Dan H." <jmachine@adelphia.net> wrote:
> Thanks Phil!
>
> Very interesting.......
> Dan H.
>
> ----- Original Message -----
> From: "Phil Nuytten" <pnuytten@compuserve.com>
> To: <personal_submersibles@psubs.org>
> Sent: Tuesday, March 28, 2006 12:09 AM
> Subject: Re: [PSUBS-MAILIST] sunken ferry update
>
>
> > Hey Rick!
> > Long time no talk. Man, that was a long
> adress for the story on the
> > Ferry. . .I would have given an account of the
> dives but the Transport
> > Safety Board slapped a 'communication ban' on the
> whole thing, and posted
> > signs on the worksite that any one who yapped to
> the press would be
> > charged. Sounds like these guys have taken a leaf
> from the airport
> > security
> > book! Anyhow, I can't tell you anymore than has
> been released by the TSB;
> > The 350'+ vessel 'Queen of the North' is sitting
> upright and intact in
> > 1400
> > feet of water. She 'skied' in, with the result
> that the bottom mud/silt (
> > actually, glacial flour-type sediment) is up to
> her car-deck . . .about
> > 30-35 feet above her keel. She must have produced
> an enormous dust-cloud
> > that followed her down slope and drifted over top
> of her - she's covered
> > with a light layer of fines.
> > Viz is good- about 30-40 feet, but lots of
> back-scatter in the HMI
> > lights, because of dense crystal critter life in
> the water column
> > (tentaphores,siphonophores,et.,etc.). Video
> recording has gone well in
> > last
> > couple of days and it looks as though the crew
> will be packing it in
> > tomorrow. The little DeepWorker2000's performed
> perfectly, as they most
> > often do - and so did the crew. Using a precision
> wireless tracking system
> > coupled with a Racal-designed position plotting
> system ('winfrog'), we
> > were
> > able to 'chain over' or interpolate the subs
> position to the
> > surface-mounted DGPS and get a precise GPS
> coordinate for every
> > significant
> > part of the wreck. This is all plotted on an
> electronic chart in the
> > tracking shack, and will allow us to return
> directly to any specific
> > location. A lot of this stuff was honed on cable
> tracking. We do many
> > cable
> > inspections every year and any damage or
> suspensions have to be position
> > recorded with sub-metre accuracy, so we can find
> 'em again. When we first
> > go on the job we transpose their 'as-laid' chart
> onto our electronic chart
> > and mark all their 'known' cable positions as red
> lines. We then dump the
> > sub in and fire up the Nuytco-designed
> cable-tracker, correlate it with
> > the acoustic transmitter and start following the
> cables - buried or laying
> > visible on the bottem- this automatically produces
> a green line on the
> > electronic chart/grid. Kinds fun to watch the
> engineers eyes bug out when
> > they see how far away the red lines are from the
> green lines!
> > This sure is an interestin' way to make a
> living!
> > Regards
> > Phil Nuytten
> >
> >
> >
> >
> >
> >
>
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