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>
>I wonder if you have ever tried to send up a liftbag?
>
> I dont think so. When the liftbag leaves bottom and starts surfacing the
>speed will so high that the only possibility you have got, is to let go!!!!!!
Interesting. I've never had this problem, although I've only deployed a
lift bag 10 or 15 times, many of those from 100 feet or deeper. I do a
couple of things, though...
1) When adding air to a lift bag, I add enough air so that it's only a
couple of pounds/kilos positive. Assuming that I send it up from, say,
132 feet, with 1 kilo positive, it will hit the surface at 5 kilos
positive (12 pounds positive). I CAN hold position against 5 kilos
positive (although I'll be working like a banshee).
2) I make DARN sure that my reel is neatly wrapped. I've never had a
line grab on me but, rather, it has always spun smoothly off of my reel.
3) When I've deployed the bag, it has always been by first passing the
rope UNDER something, bracing my feet and then letting the bag go up. As
a result, the bag can NOT drag me up. Admittedly, this works well on
wrecks when sending the bag up from the bottom and is not so good when
deplying from mid water (unless you have a VERY negative buddy ::grin::)
If I was worried that I wanted to do a drift hang, then I'd deploy the
bag from the wreck until it hit top, then cut the line loose from the
bottom and THEN ascend the line.
Note, also, that the line that I use is large diameter sisal rope. While
it's rough on the hands, it tends not to get tangled. If you're using
very small diameter nylon rope (as is used on gap reels, etc.) for a
hang, you've got a whole lot of other thinking to do.
Oh, and yes, I can restow the reel when I'm done with it, and restow it
such that line does NOT continue to spool off the reel.
>
>We do it another way. Just send the liftbag to the surface with your
>souveniers, and let the surface crew take care of the liftbag.
The only problem I have with this is sending an uncontrolled lift bag to
the surface. SOMETIMES they have a tendency to breach the surface, flop
over, deflate, and come right back down with all the goodies still
attached. On the other hand, if you have a bag that can not deflate
(other than through a pressure relief valve), then my objection pretty
much disappears (assuming that you can guarantee that there's noone above
you that might be struck by the ascending bag and goodies).
-- Kevin --
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