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You wrote.......
J, I agree whole heartedly with your view on single outlet
manifolds. There is no redundancy, no backup.
I want to thank you for an intelligent discussion of the long hose.
I have worn one and had it snag on a protruding piece of wreckage
and base my decision on that. I try to keep clutter and equipment
to the bear minimum. Speaking as you did will make someone as
pig headed as me take a second look and rethink a long hoses
use. I have not been trying to say a long hose is useless,
but I haven't felt it is a necessary piece of MY equipment. In
fact, where snags are not encountered (ie, caves, reefs, etc.)
I would recommend a long hose.
If you want to see my point of view, put on your gear and crawl
underneath an old pickup, with the muffler hanging and all
kinds of shit in the way. You'll be scraping your tanks
and your belly most of the way, even get stuck a few times.
You will have to twist at times to proceed and backup more
than once.
Long hose behind your head is no good there, on the side of
your tanks it's going to get hung up too. If anyone can
suggest an alternative I am all ears. I'll think about
it myself. And obviously I don't recommend for people to
start crawling into every hole on a wreck. I do, though,
and I rig my gear accordingly.
Thanx,
Mark
j wrote:
> Mark
>
> I am not flaming you but I would like you to consider the
> following........
>
>snip<
> Example ....... The use of doubles with a single outlet manifold is a
> bad idea and in my opinion has always been a bad idea since the introduction
> of the single hose regulator. If given the option of diving with a single
> outlet manifold or independent doubles with single regs on each tank I would
> take the independents. I still see people doing dives on wrecks with
these
> single out let manifolds because they have done it this way for years ......
> and because at one point in time this set up was considered high tech....
> As I said in my opinion it was a bad idea back then and continues to be a
> bad one now.
>
> Lets consider air sharing. Not that long ago buddy breathing was
considered
> to be the ultimate answer. A lot of people drowned because the average
> group of divers under extreme stress could not properly execute this drill.
> In a lot of cases two people drowned.
> These cases are well documented.
> The solution was the "Safe Second " on a regular length hose which is
> apparently the approach that you have used on several occasions. This
> solution also had its short comings in that it requires you to be close to
the
> partner receiving the air and does not allow for the passage of
restrictions.
> People drowned using this system. The next solution was the long hose
which
> is the currently accepted system. It is not perfect but it in my opinion is
> as much an advance over the safe second as the safe second was over buddy
> breathing when it was first introduced.
>
> Every equipment configuration has advantages and disadvantages but I
firmly
> believe that the long hose comes out on top in this comparison. You only
need
> to drown once to have a really bad day.......
>
> I base these views on the fact that I have personally been in a buddy
> breathing situation that got dicey and also in a situation were a long hose
> might have made a significant difference if I had one along. In both cases
> everything worked out and no one was hurt but it was close..... These
> incidents and other information led me to improve my equipment
> configurations... If you have not tried a long hose please give it a
> shot, you might be surprised.
>
>
> Good Diving
>
> JOSEPH KAFFl
> SUMPDIVER@MS*.CO*
>
>
>
> --
> Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
> Send subscription/archive requests to `techdiver-request@aquanaut.com'.
Mark
It sounds like you might want to try side mounts for this application,
they greatly reduce your profile and allow easier access to gear if you do get
hung up. I use them for sump diving because these areas tend to be tight
just like the wreck penetrations you described.
Since you have experience with independent singles air management should not
be a problem. Although at one point I designed built and used a pair of
sidemounts with a flexible manifold and fully redundant isolation valves I
found that the additional bulk was unacceptable for tight sumps and dive
independent singles, i.e. Sidemounts in this environment.
Good Diving
JOSEPH KAFFL
SUMPDIVER@MS*.CO*
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