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On Thu, 8 Aug 2002 12:46:46 +1000, James Dibbs
<James.Dibbs@op*.co*.au*> wrote:

> I found that most deco stops like this end up floating at a 45 degree angle
> if there is any current. This means that half your deco stop points become 
>  useless because they are too shallow.

> The best systems I've seen in Australia use a heavy, weighted chain 
> hanging vertically from a buoy.You simply swim up to the chain, attach a jon
>  line to one of the links, drift back and hang on to the other end.

Yep, a shotline. Trouble is that the more divers, the more likely it
is that they will, because of their bulk, raise the line when in a
current. Whilst I appreciate that in that part of Oz where you and I
mostly dive currents are not as much an issue as elsewhere, such as
the US eastern seaboard and Canada, I did once "stream" hanging onto
the very (not inconsiderable) weight of that shotline at about six
metres with others crowding down onto me.

I realise that this might bring down upon me the wrath of those who
know better.
  
> This allows several divers to be clipped in around the same spot without
> bumping into each other too much.

Umm, no, not necessarily.
>  
> It also means that in a big swell, the diver does not get his arm yanked up
> and  down by holding on to a horizontal bar.

Yep, Jon lines are pretty good at that.

In your and my part of the world (Sydney, Oz) huge currents are very
rare. In parts of the world where they aren't an untethered boat, with
conventional deco bars perhaps, is preferable. So are a heap of other
things such as SMB's etc.

I'd say, but I'm far from an expert in any of this, that this also
applies in Nova Scotia.

Cheers,

Christian
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