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Kevin has the right idea with one minor adjustment. You run the line under something that is too small for the up line reel to pass under. The line feeds down, under, then up. As the line feeds, it will pull you toward the wreck not up. If the reel jams or gets too hot to handle you can let it go, the reel will either jam in the wreck & stop, or it will continue to feed itself (hopping about wildly of course). You can now work out any additional problems after everything has come to a stop in front of you. Just don't reeve it under a piece of wreckage sharp enough to cut the line. I've successfully used this method maybe a hundred times. Sending a bag up free isn't an option if it's an ascent line you need in the first place. Use sisal line, because it is biodegradable, whenever it is possible. JC >> >>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 -- > > > >-- >Send mail for the `techdiver' mailing list to `techdiver@terra.net'. >Send subscription/archive requests to `techdiver-request@terra.net'. > > John Chatterton
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