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Gordon writes:

>[ ... story of lift-bag sinking deleted ... ]
>
>Like John Heimann, I carry a standard (If large) SMB reel and line, and
>a lift bag to use as a delayed SMB, for use when I don't make it back
>to the shot line. 

This is probably a naive question, but if it's that important to get back
to the shot line (in John's case, a decompression stop of > 50 mins
is a pretty good reason :-) why don't you just attach the reel to the
bottom of the shot line, so that you CAN find your way back to it?

>In the UK, (and elsewhere, I guess!) you can buy specially designed
>delayed SMBs or decompression bouys.

[Gordon describes an extremely complex one]

I use a very simple decompression marker (delayed SMB) which is a 1m
long tube on 10m of line. This is fairly standard practise in this
part of the UK.

There is no reason why a standard lifting bag couldn't be fitted with
an auto-dump (provided it could be set up to dump at the right pressure.
That might make it a bit more stable, if you really want to use it to send
up shotlines (and anything more valuable that you might find on the bottom).

Regards

Pete

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