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7 days is not enough.14 hours on the unit (9 pool,5 openwater) does not make you adequatly prepared for the problems that the close circuit systems have. - jt On Wed, 4 Sep 1996, IANTD wrote: > John > There are NO 4 day courses by IANTD on rebreathers > > On fully closed it is a 7 day course for a RB diver > On Semi it is a 5 day course > > These course run 8 AM to pm each day ther is approximately 3 x3 = 9 > hours of pool time and 3 to 5 hours of open water diving to qualify to > dive the units to 130 feet no deco. Then there is a second module to do > deco diving of equal diration once the diver has logged the prequisite > time on the unit. > > You might learn something if you took one of these cpourses. Presently > weare not conducting another one at HQ until mid oct and that one will > be on the Halcyon passive semi closed in singapore. > > The CC is more complex and takes a lot of time and skill and yes a lot > of what if training in case of electronic failures which are the > greatest risk probability in CC systems. > > A good point is anyone wishing to evolve into RB's should list there > reasons for doing so. They should list all the risk associated with > these units then the benefit they feel they individually will gain, > then corrective actions for failure points followed by a simple value > rating as either yes/no or a 1-10 value system if at the end of this > process they have a need for a RB then chose the one or as I have done > the ones that best suit the needs of the diver. If there is not a real > need or benefit they rreally do not have any business on a RB. It is > far less forgiving and requires more discipline and self control to > dive. In my case I do have a need and a benefit for a SC and a CC unit, > and I have a high degree of experience on them combined with some close > calls so I do respect them. > > RB's to me or like DPV's and fast boats they are quite good for many > people and extremeley dangerpous for others. they require training then > hours and hours of personal training in shallow water before doing > major dives on them. They can and have bit many divers in the ass. > Tom > You wrote: > > > > rich,no one who takes one of those 4 day iantd/tdi/whatever agency > >courses on "rebreather diving" will be trained right to deal with > manually > >controlling the functions of the rebreather that are normally > controlled by > >the computer.you of all people should realize that.on top of that,if > the > >computer cant be trusted then how can you expect to trust the > electronic > >output generated by the computer?at least with the mechanical > rebreathers > >(err, semi-closed) theres no fancy gadgetry or tomfoolery to mess > with,and > >as a result its safer. - jt > > > >On Tue, 3 Sep 1996, Richard Pyle wrote: > > > >> > >> > anyone who ever ran windows 3.1 should be able to tell you that > computers > >> > crash fairly often.as a result i dont want to trust my life to a > computer > >> > system. - jt > >> > >> If a rebreather is designed right, and if the user is trained right, > then > >> computers on a fully-closed rebreather are a convenience, not a > >> life-support system. If you don't believe me, as Farb. > >> > >> Rich > >> > >> > > >> > > >> > On Mon, 2 Sep 1996 gmii@in*.co* wrote: > >> > > >> > > > >> > > In reading this account of another electronic rebreather > nightmare I am > >> > > amazed at the sheer stupidity and arrogance of the "tech" > "engineers" who come > >> > > up with this crap. Clearly anything in the breathing loop of any > rebreather is > >> > > by definition at the same number of atmospheres as the diver - > obviously whoever > >> > > designed this is one dumb fuck. > >> > > > >> > > For you dumb fucks out there, that means that the chips are > compressed, the > >> > > batteries are compressed, and the besides the obvious chance to > short circuit as > >> > > they are squeezed, some components, like dry cell nicads, can > not tollerate > >> > > compression. It is no wonder , however, that the same crowd that > went for square > >> > > lights fell for this bogocity. > >> > > > >> > > Most computer chips are hermeticly sealed, which means that > they may retain > >> > > compression in their voids and explode when the pressure is > lowered. I do not > >> > > know much about rebreathers or computers, but I think NOVRAM > chips have their > >> > > own batteries, so that means the chip and the battery are being > compromised. > >> > > > >> > > Trying to encase this crap in gell would not alleveiate any > of these > >> > > problems, and would add the problem of water wicking down the > wires and causing > >> > > the endless electonic mystery. > >> > > > >> > > Just like most dive equipment, these devices are clearly > created by people who > >> > > do not actually dive for people who need a magic carpet, and the > only commercial > >> > > use for a piece of shit like what is described here is for > instructors to teach > >> > > wannabees and strokes yet one more merrit badge specialty. > >> > > > >> > > But, what else is new? - G > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > >> > -- > >> > Send mail for the `techdiver' mailing list to > `techdiver@terra.net'. > >> > Send subscription/archive requests to > `techdiver-request@terra.net'. > >> > > >> > >> Richard Pyle > >> deepreef@bi*.bi*.ha*.or* > >> ******************************************************************* > >> "WHATEVER happens to you when you willingly go underwater is > >> COMPLETELY and ENTIRELY your own responsibility! If you cannot > >> accept this responsibility, stay out of the water!" > >> ******************************************************************* > >> > >> > > > > > >
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