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This is a multi-part message in MIME format. ------=_NextPart_000_000D_01BDB0F5.360ADE80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ---- 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. =20 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)=20 =20 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. =20 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. =20 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?=20 =20 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.=20 =20 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? =20 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?? =20 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., =20 Those of you who have QD's should also practice this skill. =20 This is a good basic buddy rescue skill and we should all remain = proficient in it. =20 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. =20 The above skill is required in IANTD trimix courses now adays so I have = some knowledge of how well it works in both applications.=20 =20 Remember try these first and then talk about it from experience instead = of arm chair theory =20 Tom Tom ------=_NextPart_000_000D_01BDB0F5.360ADE80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN"> <HTML> <HEAD> <META content=3Dtext/html;charset=3Diso-8859-1 = http-equiv=3DContent-Type><!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 = HTML//EN"> <META content=3D'"MSHTML 4.72.3110.7"' name=3DGENERATOR> </HEAD> <BODY bgColor=3D#ffffff> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2><B>----</B><BR><BR></DIV></FONT> <DIV><FONT color=3D#000000 size=3D2>I read over and over about the anti = steel tanks=20 on this list when diving wet. Yet I rarely see anyone in the ocean = diving deep=20 on Aluminum cylinders. Including me I use the OMS double 85's and love = them. If=20 fact Aluminum 80's would be my last choice of diving = cylinders.</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000000 size=3D2>How many people on this list have = dived either=20 OMS double 98's (not pressed steel 95's) or OMS 85's. Those of you who = have most=20 likely can report that you can dive them even in event of BC failure. I = have=20 practiced this with both and have no problem with a 3 mil wet suit. = (using Al=20 40's for stages) </FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000000 size=3D2>In fresh water with a 3 mil suit and = no=20 cylinders or other gear I can lay on the bottom of a pool, so you can = say I'm=20 negative buoyant , Yet swimming these cylinders is doable, With steel = 45's =20 it would be difficult and I would definitely recommend a backup BC = inthis=20 event.</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000000 size=3D2>On the subject of redundant BC's if = a failure=20 occurs with any tank configuration double 80's or whatever the = second BC=20 may save your life or the life of a buddy who has had a BC failure. So = although=20 I do not always use a second BC when diving wet I certainly support the = logic=20 behind its use. For an instructor who must make a rescue it could prove = to be a=20 valuable asset.</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000000 size=3D2>I see discussions on using the lift = bag as a=20 redundant BC , on ascent or on the bottom it will work , but how about = during a=20 rapid descent in deep water, how easily will you pull out the bag = hook it=20 up to a reel and deploy the lift bag, some of you should attempt to = practice=20 this during a rapid descent and see how well it works, then come back = and give=20 you views on it s use as a reliable backup BC. plus what if the = reel jams=20 or the lift bag dumps, what is the reliability factor in this=20 method? </FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000000 size=3D2> Also have a buddy get totally = negative and=20 simulate a rescue using just your BC or a lift bag. I plan to experiment = with=20 this some myself, due to a conservation I had with one of our = instructors this=20 morning. Remember this has to be doable at a high rate of descent trying = to=20 manage yourself and your buddy. Also factor in that you are fully = negative at=20 first in order to catch the descending diver. So :\</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2>1. Catch the buddy</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2>2. Make contact</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2>3. Stabilize buoyancy</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2>4. Start ascent</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT><FONT size=3D2>5. on the = surface remain=20 stable</FONT></DIV> <DIV><FONT size=3D2>Note! check your gas consumption during this drill.=20 </FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000000 size=3D2>I suggest we all go out and = experiment with this=20 before drawing conclusions about what does or does not work. and what = works=20 under what circumstance?</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000000 size=3D2>Note this is not a brands or no = brands post this=20 is a lets see what really works post and then for those who are willing = to do=20 the practices a discussion of the results. Any takers??</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000000 size=3D2>Second practice drill while using = continuos=20 webbing (no quick releases) have a buddy simulate being unconsciousness = , while=20 in doubles and two stages. Remove the stages, and doubles on the surface = as well=20 as your own as in making a real life rescue. To make this more real = simulate=20 mouth to mouth as you are doing it.,</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000000 size=3D2>Those of you who have QD's should = also practice=20 this skill.</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000000 size=3D2>This is a good basic buddy rescue = skill and we=20 should all remain proficient in it.</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000000 size=3D2>You should also time your results = and bear in=20 mind that if the diver has no pulse or it is an AGE, the time this = is=20 accomplished in is critical.</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000000 size=3D2>The above skill is required in IANTD = trimix=20 courses now adays so I have some knowledge of how well it works in both=20 applications. </FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT color=3D#000000 size=3D2>Remember try these first and then = talk about it=20 from experience instead of arm chair theory</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV> <DIV><FONT size=3D2>Tom</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2>Tom</FONT></DIV></BODY></HTML> ------=_NextPart_000_000D_01BDB0F5.360ADE80-- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. 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