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Tom Thanks for your insight, but I disagree. I have spent the time with steel tanks and have decided the only time I will dive deep with steel tanks and a wet suit (salt or fresh water) is when I've been diagnosed with some absolutely incurable disease. I have no desire to "go early" and become another Tech statistic. My view for what it's worth. Pete > Tom Mount wrote: > > > ---- > > I read over and over about the anti steel tanks on this list when > diving wet. Yet I rarely see anyone in the ocean diving deep on > Aluminum cylinders. Including me I use the OMS double 85's and love > them. If fact Aluminum 80's would be my last choice of diving > cylinders. > > How many people on this list have dived either OMS double 98's (not > pressed steel 95's) or OMS 85's. Those of you who have most likely can > report that you can dive them even in event of BC failure. I have > practiced this with both and have no problem with a 3 mil wet suit. > (using Al 40's for stages) > > In fresh water with a 3 mil suit and no cylinders or other gear I can > lay on the bottom of a pool, so you can say I'm negative buoyant , Yet > swimming these cylinders is doable, With steel 45's it would be > difficult and I would definitely recommend a backup BC inthis event. > > On the subject of redundant BC's if a failure occurs with any tank > configuration double 80's or whatever the second BC may save your > life or the life of a buddy who has had a BC failure. So although I do > not always use a second BC when diving wet I certainly support the > logic behind its use. For an instructor who must make a rescue it > could prove to be a valuable asset. > > I see discussions on using the lift bag as a redundant BC , on ascent > or on the bottom it will work , but how about during a rapid descent > in deep water, how easily will you pull out the bag hook it up to a > reel and deploy the lift bag, some of you should attempt to practice > this during a rapid descent and see how well it works, then come back > and give you views on it s use as a reliable backup BC. plus what if > the reel jams or the lift bag dumps, what is the reliability factor in > this method? > > Also have a buddy get totally negative and simulate a rescue using > just your BC or a lift bag. I plan to experiment with this some > myself, due to a conservation I had with one of our instructors this > morning. Remember this has to be doable at a high rate of descent > trying to manage yourself and your buddy. Also factor in that you are > fully negative at first in order to catch the descending diver. So :\ > 1. Catch the buddy > 2. Make contact > 3. Stabilize buoyancy > 4. Start ascent > 5. on the surface remain stable > Note! check your gas consumption during this drill. > > I suggest we all go out and experiment with this before drawing > conclusions about what does or does not work. and what works under > what circumstance? > > Note this is not a brands or no brands post this is a lets see what > really works post and then for those who are willing to do the > practices a discussion of the results. Any takers?? > > Second practice drill while using continuos webbing (no quick > releases) have a buddy simulate being unconsciousness , while in > doubles and two stages. Remove the stages, and doubles on the surface > as well as your own as in making a real life rescue. To make this more > real simulate mouth to mouth as you are doing it., > > Those of you who have QD's should also practice this skill. > > This is a good basic buddy rescue skill and we should all remain > proficient in it. > > You should also time your results and bear in mind that if the diver > has no pulse or it is an AGE, the time this is accomplished in is > critical. > > The above skill is required in IANTD trimix courses now adays so I > have some knowledge of how well it works in both applications. > > Remember try these first and then talk about it from experience > instead of arm chair theory > > Tom > Tom -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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