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From: "Cameron Fraser" <cameron.fraser@ns*.sy*.ca*>
To: <techdiver@aquanaut.com>
Subject: Deco Station design assistance
Date: Wed, 7 Aug 2002 21:42:06 -0300
This is a multi-part message in MIME format.

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Any insight/plans/photos/design info for a deco station would be greatly
appreciated.  I am looking to advance along the learning curve of the list,
being in a far northern climate, it could ice up here any day and the season
would be cut short ;-), thus reducing the ability to test dive/hang the
device.

For background:
Location is North Atlantic, Nova Scotia
Currents are sometimes an issue, mainly ebb and flow of tides
Presently the other individuals that have exerted themselves to create a
station have dropped 10 feet of 3 inch diameter tube from the side of the
vessel. It works, however the user requires an engineered jon line
constructed from a bungee jump line!


Present thoughts are to hang vertical lines from balloons (AKA big orange
commercial grade floats).  At the various stop depths there would be be a
cross section of line spiced in and a galvanized square tube or other rigid
section (? electrical conduit) inserted to hold the spread of the station.
The conduit comes in 10 foot lengths -> the spread would probably end up in
the 10 foot range.  This would be repeated at various levels, i.e. 20, 30
and maybe as far as 40.
Taking into account the operating procedure of the dive vessel, the device
would remain tethered to the vessel (tether attaching the vessel to a
balloon); the tether being the dynamic linkage, allowing for the 'normal' 4+
feet of wave action.

Pictures will be provided of the end product for the benefit of all who
assist/are interested.

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<BODY>
<DIV><SPAN class=3D470191900-08082002><FONT face=3DArial
size=3D2>Any=20
insight/plans/photos/design info for a deco station would be greatly=20
appreciated.  I am looking to advance along the learning curve of =
the list,=20
being in a far northern climate, it could ice up here any day and the =
season=20
would be cut short ;-), thus reducing the ability to test dive/hang the=20
device.</FONT></SPAN></DIV>
<DIV><SPAN class=3D470191900-08082002><FONT face=3DArial=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D470191900-08082002><FONT face=3DArial
size=3D2>For=20
background:</FONT></SPAN></DIV>
<DIV><SPAN class=3D470191900-08082002><FONT face=3DArial =
size=3D2>Location is North=20
Atlantic, Nova Scotia</FONT></SPAN></DIV>
<DIV><SPAN class=3D470191900-08082002><FONT face=3DArial =
size=3D2>Currents are=20
sometimes an issue, mainly ebb and flow of tides</FONT></SPAN></DIV>
<DIV><SPAN class=3D470191900-08082002><FONT face=3DArial =
size=3D2>Presently the other=20
individuals that have exerted themselves to create a station have =
dropped 10=20
feet of 3 inch diameter tube from the side of the vessel. It=20
works, however the user requires an engineered jon line=20
constructed from a bungee jump line!</FONT></SPAN></DIV>
<DIV><SPAN class=3D470191900-08082002><FONT face=3DArial=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D470191900-08082002><FONT face=3DArial=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D470191900-08082002><FONT face=3DArial =
size=3D2>Present thoughts are=20
to hang vertical lines from balloons (AKA big orange commercial grade=20
floats).  At the various stop depths there would be be a cross =
section of=20
line spiced in and a galvanized square tube or other rigid section (? =
electrical=20
conduit) inserted to hold the spread of the station.  The conduit =
comes in=20
10 foot lengths -> the spread would probably end up in the 10 foot=20
range.  This would be repeated at various levels, i.e. 20, 30 and =
maybe as=20
far as 40.</FONT></SPAN></DIV>
<DIV><SPAN class=3D470191900-08082002><FONT face=3DArial
size=3D2>Taking =
into account=20
the operating procedure of the dive vessel, the device would remain =
tethered to=20
the vessel (tether attaching the vessel to a balloon); the tether being =
the=20
dynamic linkage, allowing for the 'normal' 4+ feet of wave=20
action.</FONT></SPAN></DIV>
<DIV><SPAN class=3D470191900-08082002><FONT face=3DArial=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D470191900-08082002><FONT face=3DArial =
size=3D2>Pictures will be=20
provided of the end product for the benefit of all who assist/are=20
interested.</FONT></SPAN></DIV></BODY></HTML>

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