This is a multi-part message in MIME format. ------=_NextPart_000_00D4_01C0DAEE.EFEF8FA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable You're just kidding, right? -----Original Message----- From: Thom Hadfield <thom.hadfield@ho*.co*> To: techdiver@aquanaut.com <techdiver@aquanaut.com>; Joe = <joe@po*.co*> Date: Friday, May 11, 2001 11:36 PM Subject: Re: Re. Deco diving =20 =20 Thanks for the advice. I do have a plan sorry I wasn't more clear in = the post. I will probably dive on 25% using this secedule =20 Waypoint at 140ft for 20:00 (22) on Air, PPO2 1.076, END = 140 Deep Stop at 120ft for 0:33 (23) on Air, PPO2 0.952, END = 120 Deep Stop at 110ft for 0:33 (24) on Air, PPO2 0.890, END = 110 Deep Stop at 100ft for 0:33 (24) on Air, PPO2 0.829, END = 100 Deep Stop at 90ft for 0:33 (25) on Air, PPO2 0.767, END 90 Deep Stop at 80ft for 0:33 (26) on Air, PPO2 0.705, END 80 Deep Stop at 70ft for 0:33 (26) on Air, PPO2 0.643, END 70 Deep Stop at 60ft for 0:33 (27) on Air, PPO2 0.581, END 60 Deep Stop at 50ft for 0:33 (27) on Air, PPO2 0.519, END 50 Deep Stop at 40ft for 0:33 (28) on Air, PPO2 0.457, END 40 Norm Stop at 20ft for 6:00 (34) on Air, PPO2 0.334, END 20 Norm Stop at 10ft for 17:00 (51) on Air, PPO2 0.272, END 10 =20 TOTAL DECO TIME: 28 minutes. DIVE RUN TIME: 51 minutes. CNS Total: 9.0% OTU's: 26 =20 I plan on diving either a 120 or double 80's. I am leaning toward a = 120 just for familarity I normally dive with a 120. My dive buddy has a = lot more expierence than I do but also has no deco expierence. I am = using laminated navy tables to take with me and I have a computer that = will calculate deco to 350' I am using zplan to plan out the dive and it = is the plan I intend to dive if everything goes as planned. However I = will have tables and a computer for back up. I will carry an ascent reel = and an extra 80 or 120 (haven't decided which) stage bottle down with me = and attach it to the wreck near the ascent line. My buddy is planning = the same. I may also carry it with me these are the things I plan on = working out in a quarry. Also we are considering hanging another tank = off the bow of the boat as a third extra air tank.I want to do the dive = not because of depth but because I want more than 10 mins on this wreck. I dive safe the last time I dove the wreck I planned for 140'. The = wreck is in something like 135 feet but I added in a little for error = and safety incase something happened myself or my buddy hit bottom. = Anyways my max depth was 128' and my computer told me I had another 9 = mins left at that depth but I procedded back to the ascent line = according to my dive plan. For me or my buddy this isn't a personal = accomplishment it is wanting extra time to view the splendor of this = wreck. We didn't decide to do a deco dive to prove anything we decided = we wanted to have more time at that depth and the only way was a deco = dive and we felt ok doing it on air or 25%. We are planning no = penetration except a descent and ascent into the main wide open cargo = hold. I believe trimix is good and I had not even considered trimx because = I felt this dive plan was acceptable to do on air or 25%. But when I = posted a question for tips and suggestions I had a major response that = this was unsafe on air and I must use trimix or a variation there of. I = feel comfortable on this wreck and the depth on air. However I didn't = know what to expect extending my time into decopression ranges. Sorry for the lengthy discussion but I thought it might better give = you an idea of my dive plan.=20 =20 Thanks Thom ----- Original Message -----=20 From: Joe=20 To: Thom Hadfield=20 Sent: Sunday, May 06, 2001 8:19 AM Subject: Re: Re. Deco diving =20 =20 Hi Thom: =20 Do yourself a big favor and just dive. Forget about trimix for = a while and forget about depth. The way to become a proficient and safe = diver is to evolve into it. At less than 100 dives thinking about = trimix is ludicrous. I know the agencies may list 100 dives as a = prerequisite for trimix, but believe it that you are not ready even at = 200 dives. =20 Let me explain. You could learn to execute a trimix dive after = 50 dives. As a college student you most probably could learn the = theories and the math in 20 minutes. Its probably all stuff you already = know. What you can't learn is the stuff that only time and experience = will teach you. When you make your screw ups (and you will, just like = the rest of us) you want them to occur and a depth and in a circumstance = you can survive. A mishandled incident at 75' is quite survivable. = That same event at 300' or with a serious decompression ceiling will = probably kill you. If you review most of the accidents, one of the = common threads in them is people diving beyond their experience level. = They take a course, get certified and then kill themselves doing = something stupid like an uncontrolled ascent. =20 Helium is no voodoo mystery gas. Diving it is essentially the = same as air diving. What you need are good in water skills, excellent = buoyancy control and the ability to handle task loading. What makes it = challenging to the novice is not the gas. It is the ability to monitor = your deco schedule, switch to the correct gas at the correct depth while = making sure your buddy is on the correct gas, deploy a lift bag and = possibly manage an unexpected emergency like you broke the knob off your = deco bottle in the closed position or tangled the reel on the lift bag - = all at the same time and without endangering yourself and others. If = you jump right into advanced diving, you will surely "pass" the courses = but in spite of that you won't have the experience level to fall back on = when the sh** hits the fan. That experience is what will keep you alive = and you won't have it.=20 =20 The skills you need to successfully execute any advanced dive = begin with basic diving skills. Refine those skills and build up that = experience and evolve into the advanced diving. For now, content = yourself with recreational level diving and work on the skills specific = to advanced diving (reels, lift bags multiple bottles etc. etc.) and = when you are ready to take the courses you will really reap the full = benefit of your instructors knowledge because he won't have to waste = time teaching you things you should already know. =20 >>I guess the risks of narcosis which at the depths and times I = have done I didn't experience=20 >>any is not that great at the dive I am planning. I have heard = it is a fairly safe plan to that it is >>not a safe plan. Well that's a = little of my background and thankyou for your reply's =20 Now to answer your questions. =20 You won't "feel" the narcosis until it gets to the point of the = ridiculous. Much like after "one beer" you are impaired but don't know = it. =20 =20 As far as a plan goes, you have none. (Other than to go to 140' = which is not a plan.) =20 Are you diving a single tank or doubles? Have you made = provisions for air emergencies? What are your air rules? What is your = run time? Is this a planned decompression dive? If not, do you know = what to do if you overstay and wind up in decompression? If it is do = you have contingency tables? Will you have enough gas to decompress? = Are you using a computer and if so, do you have a table to back it up? = What about your buddy? Is he at the same level as you? Will he be an = asset or a liability in the event of a mishap? =20 If this is one of those personal depth things my advice is to = can it. If it is a legitimate dive with a purpose other than depth, = think about the questions I have asked you and formulate a dive plan. =20 That said, should you have any questions, feel free to ask. If = I can answer them I will. Also, take note we have had two fatalities = this week. One a highly experienced "tech" instructor and the other a = college student open water diver who was curious about a cave. Walk = before you run. =20 Best of luck and dive safe. =20 Joe Citelli=20 =20 =20 ----- Original Message -----=20 From: Thom Hadfield=20 To: techdiver@aquanaut.com=20 Sent: Thursday, May 10, 2001 8:23 PM Subject: Re. Deco diving =20 =20 I am planning on doing the ebber ward which I have been on 3 = times. The max depth I reached on the ward was 128'. I have been over = 100' probably 8 times wothout getting out my log. I have dove several = wrecks in the 40 to 100' foot range. I dive a lot in the st. Clair river = which has low vis and current. I do most of my practice dives there. I = am currently signed up for Nitrox. I also do not have 100 dives in yet = which seems to be the basic first step for Trimix. I will have those in = by the end of this year. All of my expierence is in cold greatlakes = water. I do not plan any wreck penetration for this dive except for a = verticle decent and ascent into the wide open cargo hole which I have = done on a previous dive. The max depth for the ward unless you start to = dig a hole underneath the wreck is just dhy of 140' so I am planning my = dive for 140 but I donot plan on spending much time at that depth.=20 I am interested in trimix and I do believe it to be safer = than air or nitrox at this depth but I have not found a store in my area = who teaches it. Also it appears online that the training runs about $800 = which to me as a college student is a bit high. However I know the = response of what price can you put on a life will come up. I guess the = risks of narcosis which at the depths and times I have done I didn't = expierence any is not that great at the dive I am planning. I have heard = it is a fairly safe plan to that it is not a safe plan. Well thats a = little of my background and thankyou for your reply's ------=_NextPart_000_00D4_01C0DAEE.EFEF8FA0 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 HTML 4.0 = Transitional//EN"> <META content=3D'"MSHTML 4.72.3110.7"' name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT size=3D2>You're just kidding, right?</FONT></DIV> <BLOCKQUOTE=20 style=3D"BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: = 5px"> <DIV><FONT face=3DArial size=3D2><B>-----Original = Message-----</B><BR><B>From:=20 </B>Thom Hadfield <<A=20 = href=3D"mailto:thom.hadfield@ho*.co*">thom.hadfield@home.com</A>><BR>= <B>To:=20 </B><A = href=3D"mailto:techdiver@aquanaut.com">techdiver@aquanaut.com</A>=20 <<A = href=3D"mailto:techdiver@aquanaut.com">techdiver@aquanaut.com</A>>;=20 Joe <<A=20 = href=3D"mailto:joe@po*.co*">joe@polarbearinc.com</A>><BR><B>D= ate:=20 </B>Friday, May 11, 2001 11:36 PM<BR><B>Subject: </B>Re: Re. Deco=20 diving<BR><BR></DIV></FONT> <DIV><FONT face=3DArial size=3D2>Thanks for the advice. I do have a = plan sorry I=20 wasn't more clear in the post. I will probably dive on 25% using = this=20 secedule</FONT></DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2>Waypoint at 140ft = for 20:00=20 (22) on Air, PPO2 1.076, = END=20 140<BR>Deep Stop at 120ft for 0:33 (23) on=20 Air, PPO2 0.952, END = 120<BR>Deep=20 Stop at 110ft for 0:33 (24) on=20 Air, PPO2 0.890, END = 110<BR>Deep=20 Stop at 100ft for 0:33 (24) on=20 Air, PPO2 0.829, END = 100<BR>Deep=20 Stop at 90ft for 0:33 (25) on=20 Air, PPO2 0.767, END = 90<BR>Deep=20 Stop at 80ft for 0:33 (26) on=20 Air, PPO2 0.705, END = 80<BR>Deep=20 Stop at 70ft for 0:33 (26) on=20 Air, PPO2 0.643, END = 70<BR>Deep=20 Stop at 60ft for 0:33 (27) on=20 Air, PPO2 0.581, END = 60<BR>Deep=20 Stop at 50ft for 0:33 (27) on=20 Air, PPO2 0.519, END = 50<BR>Deep=20 Stop at 40ft for 0:33 (28) on=20 Air, PPO2 0.457, END = 40<BR>Norm=20 Stop at 20ft for 6:00 (34) on=20 Air, PPO2 0.334, END = 20<BR>Norm=20 Stop at 10ft for 17:00 (51) on=20 Air, PPO2 0.272, END=20 10</FONT></DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2>TOTAL DECO TIME: 28 = minutes.<BR>DIVE RUN TIME:=20 51 minutes.<BR>CNS Total: 9.0%<BR>OTU's: 26</FONT></DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2>I plan on diving either a 120 = or double=20 80's. I am leaning toward a 120 just for familarity I normally dive = with a=20 120. My dive buddy has a lot more expierence than I do but also has = no deco=20 expierence. I am using laminated navy tables to take with me = and I=20 have a computer that will calculate deco to 350' I am using zplan to = plan=20 out the dive and it is the plan I intend to dive if everything goes = as=20 planned. However I will have tables and a computer for back up. I = will carry=20 an ascent reel and an extra 80 or 120 (haven't decided which) stage = bottle=20 down with me and attach it to the wreck near the ascent line. My = buddy is=20 planning the same. I may also carry it with me these are the things = I plan=20 on working out in a quarry. Also we are considering hanging another = tank off=20 the bow of the boat as a third extra air tank.I want to do the dive = not=20 because of depth but because I want more than 10 mins on this=20 wreck.</FONT></DIV> <DIV><FONT face=3DArial size=3D2> I dive safe the last time I = dove the=20 wreck I planned for 140'. The wreck is in something like 135 feet = but I=20 added in a little for error and safety incase something happened = myself or=20 my buddy hit bottom. Anyways my max depth was 128' and my computer = told me I=20 had another 9 mins left at that depth but I procedded back to the = ascent=20 line according to my dive plan. For me or my buddy this isn't = a=20 personal accomplishment it is wanting extra time to view the = splendor of=20 this wreck. We didn't decide to do a deco dive to prove anything we = decided=20 we wanted to have more time at that depth and the only way was a = deco dive=20 and we felt ok doing it on air or 25%. We are planning no = penetration except=20 a descent and ascent into the main wide open cargo = hold.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>I believe trimix is good and I had = not even=20 considered trimx because I felt this dive plan was acceptable to do = on air=20 or 25%. But when I posted a question for tips and suggestions I had = a major=20 response that this was unsafe on air and I must use trimix or a = variation=20 there of. I feel comfortable on this wreck and the depth on air. = However I=20 didn't know what to expect extending my time into decopression=20 ranges.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>Sorry for the lengthy discussion = but I thought=20 it might better give you an idea of my dive plan. </FONT></DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2>Thanks Thom</FONT></DIV> <BLOCKQUOTE=20 style=3D"BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; = MARGIN-RIGHT: 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px"> <DIV style=3D"FONT: 10pt arial">----- Original Message ----- = </DIV> <DIV=20 style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B>=20 <A href=3D"mailto:joe@po*.co*" = title=3Djoe@po*.co*>Joe</A>=20 </DIV> <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20 href=3D"mailto:thom.hadfield@ho*.co*" = title=3Dthom.hadfield@ho*.co*>Thom=20 Hadfield</A> </DIV> <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, May 06, = 2001 8:19=20 AM</DIV> <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: Re. Deco = diving</DIV> <DIV><BR></DIV> <DIV><FONT size=3D2>Hi Thom:</FONT></DIV> <DIV> </DIV> <DIV><FONT size=3D2>Do yourself a big favor and just dive. = Forget=20 about trimix for a while and forget about depth. The way = to become=20 a proficient and safe diver is to evolve into it. At less = than 100=20 dives thinking about trimix is ludicrous. I know the = agencies may=20 list 100 dives as a prerequisite for trimix, but believe it that = you are=20 not ready even at 200 dives.</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>Let me explain. You could learn to = execute a=20 trimix dive after 50 dives. As a college student you = most=20 probably could learn the theories and the math in 20 = minutes. Its=20 probably all stuff you already know. What you can't learn = is the=20 stuff that only time and experience will teach you. = When you=20 make your screw ups (and you will, just like the rest of us) you = want=20 them to occur and a depth and in a circumstance you can=20 survive. A mishandled incident at 75' is quite = survivable. =20 That same event at 300' or with a serious decompression ceiling = will=20 probably kill you. If you review most of the accidents, = one of the=20 common threads in them is people diving beyond their experience=20 level. They take a course, get certified and then = kill=20 themselves doing something stupid like an uncontrolled=20 ascent.</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>Helium is no voodoo mystery gas. = Diving it is=20 essentially the same as air diving. What you need are good = in=20 water skills, excellent buoyancy control and the ability to = handle task=20 loading. What makes it challenging to the novice is not = the=20 gas. It is the ability to monitor your deco schedule, = switch=20 to the correct gas at the correct depth while making sure your = buddy is=20 on the correct gas, deploy a lift bag and possibly manage an = unexpected=20 emergency like you broke the knob off your deco bottle in the = closed=20 position or tangled the reel on the lift bag - all at the = same time=20 and without endangering yourself and others. If you jump = right=20 into advanced diving, you will surely "pass" the = courses but=20 in spite of that you won't have the experience level to fall = back on=20 when the sh** hits the fan. That experience is what will = keep you=20 alive and you won't have it. </FONT><FONT size=3D2></FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>The skills you need to successfully = execute any=20 advanced dive begin with basic diving = skills. Refine=20 those skills and build up that experience and evolve into the = advanced=20 diving. For now, content yourself with recreational level = diving=20 and work on the skills specific to advanced diving (reels, lift = bags=20 multiple bottles etc. etc.) and when you are ready to take the = courses=20 you will really reap the full benefit of your instructors=20 knowledge because he won't have to waste time teaching=20 you things you should already know.</FONT></DIV> <DIV> </DIV> <DIV><FONT size=3D2>>>I guess the risks of narcosis which = at the=20 depths and times I have done I didn't experience </FONT></DIV> <DIV><FONT size=3D2>>>any is not that great at the dive I = am=20 planning. I have heard it is a fairly safe plan to that it is=20 >>not a safe plan. Well that's a little of my background = and=20 thankyou for your reply's</FONT></DIV> <DIV> </DIV> <DIV><FONT size=3D2>Now to answer your questions.</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>You won't "feel" the narcosis = until it gets=20 to the point of the ridiculous. Much like after "one=20 beer" </FONT><FONT size=3D2>you are impaired but don't know = it. =20 </FONT></DIV> <DIV> </DIV> <DIV><FONT size=3D2>As far as a plan goes, you have none. (Other = than to=20 go to 140' which is not a plan.)</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>Are you diving a single tank = or doubles? =20 Have you made provisions for air emergencies? What are = your air=20 rules? What is your run time? Is this a planned=20 decompression dive? If not, do you know what to do if you = overstay=20 and wind up in decompression? If it is do you have = contingency=20 tables? Will you have enough gas to decompress? Are = you=20 using a computer and if so, do you have a table to back it = up? =20 What about your buddy? Is he at the same level as = you? Will=20 he be an asset or a liability in the event of a = mishap?</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>If this is one of those personal depth = things my=20 advice is to can it. If it is a legitimate dive with a = purpose=20 other than depth, think about the questions I have = asked you and=20 formulate a dive plan.</FONT></DIV> <DIV> </DIV> <DIV><FONT size=3D2>That said, should you have any = questions, feel=20 free to ask. If I can answer them I will. Also, = take=20 note we have had two fatalities this week. One a = highly=20 experienced "tech" instructor and the other a college = student=20 open water diver who was curious about a cave. Walk before = you=20 run.</FONT></DIV> <DIV> </DIV> <DIV><FONT size=3D2>Best of luck and dive safe.</FONT></DIV> <DIV> </DIV> <DIV><FONT size=3D2>Joe Citelli</FONT> </DIV> <DIV> </DIV> <DIV> </DIV> <BLOCKQUOTE=20 style=3D"BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; = MARGIN-RIGHT: 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px"> <DIV style=3D"FONT: 10pt arial">----- Original Message ----- = </DIV> <DIV=20 style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B>=20 <A href=3D"mailto:thom.hadfield@ho*.co*"=20 title=3Dthom.hadfield@ho*.co*>Thom Hadfield</A> </DIV> <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20 href=3D"mailto:techdiver@aquanaut.com"=20 title=3Dtechdiver@aquanaut.com>techdiver@aquanaut.com</A> = </DIV> <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Thursday, May = 10, 2001=20 8:23 PM</DIV> <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re. Deco = diving</DIV> <DIV><BR></DIV> <DIV><FONT face=3DArial size=3D2>I am planning on doing the = ebber ward=20 which I have been on 3 times. The max depth I reached on the = ward=20 was 128'. I have been over 100' probably 8 times wothout = getting out=20 my log. I have dove several wrecks in the 40 to 100' foot = range. I=20 dive a lot in the st. Clair river which has low vis and = current. I=20 do most of my practice dives there. I am currently signed up = for=20 Nitrox. I also do not have 100 dives in yet which seems to = be the=20 basic first step for Trimix. I will have those in by the end = of this=20 year. All of my expierence is in cold greatlakes water. I do = not=20 plan any wreck penetration for this dive except for a = verticle=20 decent and ascent into the wide open cargo hole which I have = done on=20 a previous dive. The max depth for the ward unless you start = to dig=20 a hole underneath the wreck is just dhy of 140' so I am = planning my=20 dive for 140 but I donot plan on spending much time at that = depth.=20 </FONT></DIV> <DIV><FONT face=3DArial size=3D2>I am interested in trimix = and I do=20 believe it to be safer than air or nitrox at this depth but = I have=20 not found a store in my area who teaches it. Also it appears = online=20 that the training runs about $800 which to me as a college = student=20 is a bit high. However I know the response of what price can = you put=20 on a life will come up. I guess the risks of narcosis which = at the=20 depths and times I have done I didn't expierence any is not = that=20 great at the dive I am planning. I have heard it is a fairly = safe=20 plan to that it is not a safe plan. Well thats a little of = my=20 background and thankyou for your=20 = reply's</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></B ODY></HTML>= ------=_NextPart_000_00D4_01C0DAEE.EFEF8FA0-- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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