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I think the major worry hear is why the unit would ask you to do this at depth, as Errol has pointed out. We have several Inspiration users here in HK who use them for their work, and we have in fact discussed this "feature". I know they were made aware during their training that this could happen, and were definitely informed not to recalibrate at depth. I sincerely suspect that task loading combined with the wrong gas caused the problem. I would have thought, however, that this "feature" could be improved or removed. -- John Taylor Marketing and Trading Systems CREDIT | FINANCIAL SUISSE | PRODUCTS * +852 2101 6927 (Office) * +852 2101 7698 (Fax) * +852 9031 6395 (Mobile) * mailto:john.taylor@cs*.co*.uk* * mailto:live4diving@ho*.co* > -----Original Message----- > From: Steven Bliim [SMTP:Steven.Bliim@Mc*.co*.au*] > Sent: Friday, September 03, 1999 7:15 AM > To: 'Errol Kalayci'; 'techdiver@aquanaut.com' > Subject: RE: Rebreather problems? > > Errol > > I was not present on the dive. I have merely passed on the email message > that I received from one of the students on the course. I cannot vouch for > the veracity of the account given but pass the information on in the form > I received it. I think that at the least this information could be vital > to other users of the Inspiration rebreather - ie do not recalibrate at > depth if asked (question as to why the hell the machine would ask you to > do this at depth) and make darn sure that your bail out bottle will allow > you to do exactly that - bail out. > > > Regards > Steve Bliim > > -----Original Message----- > From: Errol Kalayci [SMTP:errol@ga*.ne*] > Sent: Wednesday, 1 September 1999 21:30 > To: Steven Bliim; techdiver@aquanaut.com > Subject: Re: Rebreather problems? > > Steve, > So let me get this straight: 1) Barry was teaching a trimix course while > using a CCR. 2) Barry's other instructor did a normal dive and deco, this > implies either solo diver or abandonding Barry when he had a problem. > Does anyone still have a question why an instructor should not be ona > rebreather while teaching any course? > > All things considered Steve, you were very lucky to live through > such a major violation of Rules #1 & 2. > Errol > > -----Original Message----- > From: Steven Bliim < Steven.Bliim@Mc*.co*.au* < > <mailto:Steven.Bliim@Mc*.co*.au*>>> > To: techdiver@aquanaut.com < <mailto:techdiver@aquanaut.com>> < > techdiver@aquanaut.com < <mailto:techdiver@aquanaut.com>>> > Date: Tuesday, August 31, 1999 11:40 PM > Subject: Rebreather problems? > > > > 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 > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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