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This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01BEF40E.B68F0BA0 Content-Type: text/plain The following is reported to have occurred in Sydney, Australia in early August. One might say that Barry should buy a lottery ticket after this one. What a weekend! In Sydney to start my trimix course with Barry Hallett at > Southern Cross, Saturday was dead flat so bugger the course we did two 48m > dives with a fairly hefty surface interval, 20m viz on the Coollooli > and the Dee Why. Did some theory and mixing that afternoon, then Sunday did > another 48m dive on the wreck next to the Dee Why (Meggol), on 21.5/22 > Trimix, I had a lovely dive. Barry on his Buddy Inspiration fully closed > circuit rebreather however had a less than happy day (See below for the > full details). At almost 50m, Barry's 'breather gave him pure O2, yup, 6.0 > atm, needless to say he suffered major nausea, visual disturbances, and > what he describes as like being hit with 240v, twice. He suffered two big > hits but was able to make it to the surface on open circuit, negating > almost 30min of deco, no signs or symptons experienced - he's a very lucky > man. Not to be outdone, his other instructor, Kosta, also on a Buddy > Inspiration surfaced after a normal dive and deco, and took a mild shoulder > hit of DCS, so he went down for another 20min of deco, surfaced with no > other problems. This is also after their new girl in the shop took a foot > hit on Wed after a 48m dive, normal profile with the only contributing > factor being she had cold feet - she's now going to buy a drysuit! > > My dive went uneventfully, trimix is a lovely gas for clearing the head and > focussing clearly, and completing tasks much more quickly. Looking forward > to using it on the 70m dives next month, then......! > > Barry's big day out: (don't read on if details bore you!) > > Barry's Inspiration uses three separate electronically controlled O2 > sensors and a polling method. Near the start of the dive and on the bottom > at nearly 50m, one sensor went u/s, and the computer asked him if he wanted > to recalibrate all three, and in his self admitted complacency, he answered > yes. He later realised the computer was asking him a question akin to "Do > you want to suffer an enormous CNS O2 seizure and die, or not?" As the O2 > set point for the dive was 1.4, and as he had just told the sensors that he > was now only at 1 atm, and therefore PO2 of 0.21, the 'breather then > commenced adding pure o2 into the loop, with the expected results of two > major seizures. He should not be alive to tell this story, as on the > ascent, having bailed to open circuit, his bailout gas supply exhausted (he > suspects it wasn't full to start with - error #2), luckily he had made it > to the ascent line and was able to receive gas from another diver, but he > continued to the surface fearing another major hit, which actually > occurred. He was also not cognitive of one divers efforts to give him air, > despite being right in his face. Barry will freely admit he f___d up, due > to complacency. He still has faith in the rebreather, and is not shy to > tell people what he did wrong in orer to let other people learn from his > mistakes. Here endeth the lesson. > > Regards Steven Bliim ------_=_NextPart_001_01BEF40E.B68F0BA0 Content-Type: text/html Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; = charset=3Dus-ascii"> <META NAME=3D"Generator" CONTENT=3D"MS Exchange Server version = 5.5.2232.0"> <TITLE>Rebreather problems?</TITLE> </HEAD> <BODY> <P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">The following is = reported to have occurred in Sydney, Australia in early August. One = might say that Barry should buy a lottery ticket after this = one.</FONT></P> <BR> <P><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">What a = weekend! In Sydney to start my trimix course with Barry Hallett = at</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> Southern = Cross, Saturday was dead flat so bugger the course we did two = 48m</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> dives with a = fairly hefty surface interval, 20m viz on the Coollooli </FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> and the Dee = Why. Did some theory and mixing that afternoon, then Sunday</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">did</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> another 48m = dive on the wreck next to the Dee Why (Meggol), on 21.5/22</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> Trimix, I had = a lovely dive. Barry on his Buddy Inspiration fully closed</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> circuit = rebreather however had a less than happy day (See below for the</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> full details). = At almost 50m, Barry's 'breather gave him pure O2, yup, 6.0</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> atm, needless = to say he suffered major nausea, visual disturbances, and</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> what he = describes as like being hit with 240v, twice. He suffered two = big</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> hits but was = able to make it to the surface on open circuit, negating</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> almost 30min = of deco, no signs or symptons experienced - he's a very lucky</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> man. Not to be = outdone, his other instructor, Kosta, also on a Buddy</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> Inspiration = surfaced after a normal dive and deco, and took a mild</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">shoulder</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> hit of DCS, so = he went down for another 20min of deco, surfaced with no</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> other = problems. This is also after their new girl in the shop took a = foot</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> hit on Wed = after a 48m dive, normal profile with the only contributing</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> factor being = she had cold feet - she's now going to buy a drysuit!</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">></FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> My dive went = uneventfully, trimix is a lovely gas for clearing the head</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">and</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> focussing = clearly, and completing tasks much more quickly. Looking forward</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> to using it on = the 70m dives next month, then......!</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">></FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> Barry's big = day out: (don't read on if details bore you!)</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">></FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> Barry's = Inspiration uses three separate electronically controlled O2</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> sensors and a = polling method. Near the start of the dive and on the</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">bottom</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> at nearly 50m, = one sensor went u/s, and the computer asked him if he</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">wanted</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> to recalibrate = all three, and in his self admitted complacency, he</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">answered</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> yes. He later = realised the computer was asking him a question akin to "Do</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> you want to = suffer an enormous CNS O2 seizure and die, or not?" As the = O2</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> set point for = the dive was 1.4, and as he had just told the sensors that</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">he</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> was now only = at 1 atm, and therefore PO2 of 0.21, the 'breather then</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> commenced = adding pure o2 into the loop, with the expected results of two</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> major = seizures. He should not be alive to tell this story, as on = the</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> ascent, having = bailed to open circuit, his bailout gas supply exhausted</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">(he</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> suspects it = wasn't full to start with - error #2), luckily he had made it</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> to the ascent = line and was able to receive gas from another diver, but he</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> continued to = the surface fearing another major hit, which actually</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> = occurred. He was also not cognitive of one divers efforts to give = him</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">air,</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> despite being = right in his face. Barry will freely admit he f___d up, due</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> to = complacency. He still has faith in the rebreather, and is not shy = to</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> tell people = what he did wrong in orer to let other people learn from his</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">> mistakes. Here = endeth the lesson.</FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">></FONT> <BR><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">></FONT> </P> <P><FONT SIZE=3D2 FACE=3D"Arial">Regards</FONT> <BR><FONT SIZE=3D5 FACE=3D"Brush Script MT">Steven Bliim</FONT> </P> </BODY> </HTML> ------_=_NextPart_001_01BEF40E.B68F0BA0-- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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