Mark

>Never had a problem with it snagging - even if you did whats the issue -
just flick the line clear!

It is strange how shit can happen usually at the most inconvenient time.

>Depth is not the issue I was raising it is bail out deco gas - I just find
that my profiles on dives > 80m would give me >insufficient gas reserves to
complete the deco if my travel or deco gas blows out.  Therefore I prefer to
return to a >point with spare gas staged.

Apologies, I misread what you had written.  I really hate coming back to the
shot and especially hate having to stage deco gas on a shot (which I have
never done except for cave diving).  My very good dive partners would say
(probably rightly) that I can't find my way around a wreck and so have no
hope of finding a shot :-)

What I'll be doing, when the bloody weather here improves, is to switch to 3
deco gasses for 80m and deeper dives (two 7 litres and a 3 litre pony).
There will be no increased weight out of water to what I have been diving
(two 10.4 litre stages).  It will provide me better deco and greater bail out
options.   What actual depths are we talking about here for your dives?

>Amount of line is not an issue - I nomally just free ascend to my first deep
stop and blow the bag from there. 

See my earlier post on the downside of this when an early or late ascent is
performed.

David Shimell
Email: shimell@se*.co* <mailto:shimell@se*.co*> 
Project Manager, IBM NUMA-Q, Sequent Computer Systems Limited,
Weybridge Business Park, Addlestone Road, Weybridge, Surrey, KT15 2UF, UK
registered in England and Wales under company number: 1999363, registered
office as above

-----Original Message-----
From:	Mark Dixon [SMTP:jj@da*.co*]
Sent:	Thursday, October 28, 1999 10:58 PM
To:	Paltz, Art; Shimell, David (shimell); Peter Fjelsten; Mike Rodriguez
Cc:	Techdiver@aquanaut.com
Subject:	Jersey reel

Responses to the various comments on Jersey reel or bagging off wrecks
 
Peter Fjelsten wrote
 
> >As I said not a problem if you leave the
> >bottom on schedule with the other divers, but it could be an issue 
> >otherwise,
> >especially if you've swum to the other end of a long wreck.
> 
> Sure. Especially in low-vis topside.

I agree - in low surface vis - return to the shot line.  (Mid channel - I
always carry an EPIRB for peace of mind!)
 
 
David Shimell wrote
 
> Hmm.  I used to do this but realised it was pure laziness on my part.  I
> always hold my reel now, it makes it easier to discard if you need to and
> allows you to deco in a horizontal attitude more easier than with a clipped
> off reel where the line goes over your shoulder and could snag on your
> cylinder valves.
 
Never had a problem with it snagging - even if you did whats the issue - just
flick the line clear!

> Nope, the drift technique works fine for 80m stuff also - a reel with ample
> capacity is required.  If you don't have this then you risk being lost.
That
> is, if you can't fire your DSMB from the wreck and the current is running,
> you can drift some considerable distance before you deploy your DSMB and it
> surfaces.  In practice, this is not a problem at the end of your dive, as
> you'll be drifting somewhere in the region of the other divers as you
state.
> However, if you leave early or late, then there is an issue.  Moral: always
> carry a reel with sufficient line to deploy from the wreck.
>
 
Depth is not the issue I was raising it is bail out deco gas - I just find
that my profiles on dives > 80m would give me insufficient gas reserves to
complete the deco if my travel or deco gas blows out.  Therefore I prefer to
return to a point with spare gas staged.
 
Amount of line is not an issue - I normally just free ascend to my first deep
stop and blow the bag from there. 

 
Art Paltz wrote
 
> Scheduling is fine.  I think it causes a big problem on the repeat dive.
If
> you have people on the boat doing a 20 minute no deco dive and another
> person doing a dive that requires 2 hours tot in water, is the non-deco
> diver going to want to wait an hour and 40 minutes to get in the water?  Is

>  I give your beginners credit if they are comfortable doing a free
> ascent under a bag.  Most of the truly beginners I know would probably have
> trouble with this task.
 
I agree with this - we only use scheduling when everybody is doing the same
dive, no second dives on these trips!  Bagging off is a relatively difficult
skill and takes practice but it is often used from shallow wrecks in the UK
and therefore most divers have assimilated this skill before moving onto
deeper dives with a statutory deco requirement.

 
Mike Rodriguez wrote:
 
>If you're having trouble staying horizontal during deco, you
> may be able to solve the problem by spending some time a in
> pool adjusting your trim.
> 
Gee thanks for that useful information - I never thought of any of this!
Where did I say that I didn't do my deco in a horizontal position - which in
fact I do.  Guess you should read the mail properly before you start doling
out the smart guy comments.
 
> Additionally, if a boat a fisherman's hook (this happened to me
> once) snags your lift-bag, it may pull you to the surface before
> you can release the reel.  If the pull is strong enough, it may
> make it difficult or impossible to unclip the reel against the
> tension.
 
I agree that this is the risk but you can hear a boat approaching and unclip.
I just find that on a long hang with a swell running that clipping in takes
the strain out of your arm (alternatively attach a piece of shot cord between
the buoy and line to take out the snatch.

Cheers
 
Mark
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