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Date: Mon, 23 Feb 1998 18:26:55 +0900 (JST)
From: Andrew Drapp <andrew@ce*.co*.jp*>
To: Drew Mooney <dmooney@cy*.ne*>
cc: techdiver@aquanaut.com
Subject: Re: Independent doubles and the long hose

> Another of my points is that when you dive independants, you complicate the
> long hose thing. How do you determine which tank gets the short hose?

I was putting the long hose on the right hand post.  That just made the
hose routing a little simplier.  I don't see much of a practical
difference on which post it goes on.  I am assuming that when I need to
donate air, it is my buddy that has had the problem, and not myself.  

> So what if you're on a dive and you lose
> all the air out of one tank, and wonder of wonders, a buddy has the same
> thing happen to his entire supply? Buddy breathe?

So, tell me, what do you do if your buddy has a manifold failure, and
loses all of his gas, and you have a reg failure and lose a post (the one
with the long hose)?  The exact same situation.  You defined a problem
with 3, count them THREE, catastrophic failures, and ask me how I deal
with that?  Talk about boogie man.  But, since you asked, I would just
buddy breath off of the short hose.

> Do you solo dive with your independants? Then a long hose becomes a moot
> point. But I suspect that you don't and that it's not.

Sometimes.  Not that often.  Mostly with a buddy.

> Please explain your situation.

I assume you mean about why I am using independents?  I really didn't want
to get into it, but since you asked, here it is.

I live in Japan.  Here, due to different regulations, owning tanks is
prehibitively expensive.  An AL80 will run around $500US.  Larger steel
tanks are more.  Manifolds also cary a premium, and would require getting
certified by the government since they would have to be imported.  I
estimate the cost for a set of manifold doubles at around $2000US.  The
typical format is to rent tanks at dive sites.  Becase of this, airfills
are largely nonexistant.  Also, due to past corruption and strong ties to
the Japanese mob, the fishing union actually controls the oceans in
Japanese waters.  To be able to dive, you have to get permission from the
fishing unions.  "Diving services" have been setup, which got permission
from the unions, and you pay the diving service for the right to dive
there.  They give a cut to the fishing unions.  To keep people from just
showing up and diving, most places require that you dive with their tanks.
So, if I did actually shell out the $2KUS for the manifold doubles, I
wouldn't be able to use them at most dive sights near me.  Furthermore, I
get to the dive sites I vist by train or by motorcycle.  I am not too
interested in carying all that gear on the train, and am physically unable
to do so on my motorcycle, so I would have to mail the stuff to the diving
service, use it and mail it back, at an additional cost of $50-$100.

So, as you can see, like I origionaly said, diving manifold doubles is not
an option with me.

Now, back to my point, what to do with the long hose after switching away
from it.  I have gotten several posts privetly and the answers are
sumerized as follows:

1.  Just use two short hoses.  (most common responce)
2.  Put the long hose in the necklace, and clip off the short hose.  I was
doing the opposite.  Interesting idea, and something I will try on the
next dive.
3.  Use one back tank, and sling the other tank.  
4.  Carry three seconds.  Stuff the long hose second, and use the two
short hose seconds.

Personally I like the first two better for ease of use.  The 3rd option
seems nice, but kinda annoying during the dive.  Option 4 doesn't seem
like too good of an idea, which the origional sugester also thought was a
bad idea.

Andrew Drapp


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