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This is a multi-part message in MIME format. ------=_NextPart_000_010A_01C2ECCA.EE953520 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello Bill:=20 I have been following this thread for a few days now and I must say that = I am somewhat perplexed by some of the logic being used to justify the = safety of the Inspiration. Numbers do not lie and if the 4 out of 14 UK = fatalities are a true statistic the Inspiration is directly linked with = 28% of the diving deaths in the UK while having nowhere near the same = proportional share of divers. Be assured that were it a motor vehicle = with the same dismal record it would be subject to recall.=20 I am trying to keep an open mind with respect to all that has been said = and have read the "rebuttal" URL to which you refer. I find flaws in = the reasoning used to defend the Inspiration. I quote (italics) and = comment below: =20 "......fixing point for the battery box. Condensation can form on this = screw under high-humidity conditions (such as the end of a dive). But = droplets only go anywhere near the sensors if you tip a damp unit on its = back. This is why users are very cautious about how the unit is handled = post-dive; it can sit upright, or it can be laid on its front without = hazard."=20 Sounds like an accident waiting to happen. What if the diver rolls on = his back while stretching during deco or to negotiate a restriction in a = cave where you have to "snake" through an area that requires you to be = with your back down? Or what if someone on the boat moves it and lays = it down, the puts it back and the diver has no knowledge of it? This is = an unnecessary risk built into the unit. =20 "The O2 sensors are located on the inhalation side of the breathing = loop, so you have warm gas that just went through the scrubbing process = meeting with cooler gas that you will inhale thus the condensation = forming on the cell faces. This condensation causes = discrepancies/inaccuracies within the cell readings and they begin to = VOTE trying to figure out which one is more than .2 bar out of line with = the other. Cell warnings will manifest within this period of time and = the diver will begin to get audible and visual alarms ...task loading = increases.=20 The voting system is not about "which one is more than .2 bar out of = line with the other". A quick read through the manual will tell you = this." I don't quite follow the answer here. Isn't the real issue that the = sensors are placed on the inhalation side of the loop, not how the = voting logic circuit functions? It is well known that moisture and O2 = sensors are a bad combination under any circumstance. "Mouthpiece does not have OC bailout built into it, bailout is a time of = increased stress so it is pertinent the transition should be smooth = without chance for a mistake.=20 The reasons for me coming off-loop are because it's flooded (with the = attendant risk of caustic cocktail) or because I've chucked into it. In = either case, the mouthpiece is not viable, so I don't *want* it to be = part of my OC bailout."=20 Doesn't the RB diver come off loop for a "sanity" break when hypercapnia = is suspected? Is it not correct that once you come off loop and the = mouthpiece is in OC bailout position it can be flushed out like any = other regulator, making vomitus etc. a non issue? "One of the questions ask if you would like to calibrate `yes or no` if = the diver is stressed and chooses `yes` they will effectively be adding = 100% oxygen into the breathing loop no matter what depth they are at in = the water column.=20 So don't shut off both handsets in the water. In the extremely unlikely = event that you do, the only questions you have to answer are "Dive now?" = (to which you answer "yes", of course) and (on earlier units) = "Calibrate?" (to which you answer "no"). Current units won't even ask = the second question."=20 Seems to me it should have a fail safe mode of some sort or require = manual injection to calibrate. This sounds like another accident = waiting to happen.=20 From one of your posts: "Inspiration divers have raised the bar so high IN THE OCEAN that it = can't be touched." I didn't think this was a competitive sport nor did I think depth was a = measure of anything other than a distance. This type of bravado is very = dangerous. The presentation of seriously flawed dive execution and = planning as excellence (buddy separation, unmatched gas supplies, = different run times and different deco schedules) is even more = dangerous. A dive of this magnitude is a "mission" and needs to be = treated as such. Most seasoned technical divers could successfully = execute this type of dive when ALL goes according to plan. What makes = the difference between those that are consistently successful and those = who are just lucky is the formulation of the plan, how it is adhered to = and executed and what goes down when the sh*t hits the fan. I will defend the right of the individual to make his own informed = choice, even if it is to kill himself with a bad piece of gear, = *provided* his is an informed choice. I think that courtesy of = information obtained from biased literature and URL's such as the ones = you cite, many Inspiration divers have made misinformed decisions. Joe Citelli ------=_NextPart_000_010A_01C2ECCA.EE953520 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2600.0" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff background=3D""><FONT face=3DArial = size=3D2></FONT><BR><FONT=20 face=3DArial size=3D2> Hello Bill: <BR><BR>I have been following = this thread=20 for a few days now and I must say that I am somewhat perplexed by some = of the=20 logic being used to justify the safety of the Inspiration. Numbers = do not=20 lie and if the 4 out of 14 UK fatalities are a true statistic the = Inspiration is=20 directly linked with 28% of the diving deaths in the UK while having = nowhere=20 near the same proportional share of divers. Be assured that = were it=20 a motor vehicle with the same dismal record it would be subject to = recall.=20 <BR><BR>I am trying to keep an open mind with respect to all that has = been said=20 and have read the "rebuttal" URL to which you refer. I find flaws = in the=20 reasoning used to defend the Inspiration. I quote (italics) = and=20 comment below: <BR><BR></FONT><FONT size=3D2><FONT=20 face=3DArial><EM>"......fixing point for the battery box. Condensation = can form on=20 this screw under high-humidity conditions (such as the end of a dive). = But=20 droplets only go anywhere near the sensors if you tip a damp unit on its = back.=20 This is why users are very cautious about how the unit is handled = post-dive; it=20 can sit upright, or it can be laid on its front without hazard."=20 <BR></EM><BR>Sounds like an accident waiting to happen. What if = the diver=20 rolls on his back while stretching during deco or to negotiate a = restriction in=20 a cave where you have to "snake" through an area that requires you to be = with=20 your back down? Or what if someone on the boat moves it and lays = it down,=20 the puts it back and the diver has no knowledge of it? This is an=20 unnecessary risk built into the unit. = <BR><BR></FONT></FONT><FONT=20 size=3D2><FONT face=3DArial><EM>"The O2 sensors are located on the = inhalation side=20 of the breathing loop, so you have warm gas that just went through the = scrubbing=20 process meeting with cooler gas that you will inhale thus the = condensation=20 forming on the cell faces. This condensation causes = discrepancies/inaccuracies=20 within the cell readings and they begin to VOTE trying to figure out = which one=20 is more than .2 bar out of line with the other. Cell warnings will = manifest=20 within this period of time and the diver will begin to get audible and = visual=20 alarms ...task loading increases. <BR><BR>The voting system is not about = "which=20 one is more than .2 bar out of line with the other". A quick read = through the=20 manual will tell you this."<BR></EM><BR>I don't quite follow the answer=20 here. Isn't the real issue that the sensors are placed on the = inhalation=20 side of the loop, not how the voting logic circuit functions? It = is well=20 known that moisture and O2 sensors are a bad combination under any=20 circumstance.<BR><BR></FONT></FONT><FONT size=3D2><FONT = face=3DArial><EM>"Mouthpiece=20 does not have OC bailout built into it, bailout is a time of increased = stress so=20 it is pertinent the transition should be smooth without chance for a = mistake.=20 <BR></EM><BR></FONT></FONT><FONT size=3D2><FONT face=3DArial><EM>The = reasons for me=20 coming off-loop are because it's flooded (with the attendant risk of = caustic=20 cocktail) or because I've chucked into it. In either case, the = mouthpiece is not=20 viable, so I don't *want* it to be part of my OC bailout." = <BR></EM><BR>Doesn't=20 the RB diver come off loop for a "sanity" break when hypercapnia is=20 suspected? Is it not correct that once you come off loop and the=20 mouthpiece is in OC bailout position it can be flushed out like any = other=20 regulator, making vomitus etc. a non = issue?<BR><BR> </FONT></FONT><FONT=20 size=3D2><FONT face=3DArial><EM>"One of the questions ask if you would = like to=20 calibrate `yes or no` if the diver is stressed and chooses `yes` they = will=20 effectively be adding 100% oxygen into the breathing loop no matter what = depth=20 they are at in the water column. <BR><BR>So don't shut off both handsets = in the=20 water. In the extremely unlikely event that you do, the only questions = you have=20 to answer are "Dive now?" (to which you answer "yes", of course) and (on = earlier=20 units) "Calibrate?" (to which you answer "no"). Current units won't even = ask the=20 second question." <BR></EM><BR>Seems to me it should have a fail safe = mode of=20 some sort or require manual injection to calibrate. This sounds = like=20 another accident waiting to happen. <BR><BR>From one of your=20 posts:<BR><BR><EM>"Inspiration divers have raised the bar so high IN THE = OCEAN=20 that it can't be touched."<BR></EM><BR>I didn't think this was a = competitive=20 sport nor did I think depth was a measure of anything other than a=20 distance. This type of bravado is very dangerous. The = presentation=20 of seriously flawed dive execution and planning as excellence (buddy = separation,=20 unmatched gas supplies, different run times and different deco = schedules) is=20 even more dangerous. A dive of this magnitude is a "mission" and = needs to=20 be treated as such. Most seasoned technical divers could = successfully=20 execute this type of dive when ALL goes according to plan. What = makes the=20 difference between those that are consistently successful and those who = are just=20 lucky is the formulation of the plan, how it is adhered to and executed = and what=20 goes down when the sh*t hits the fan.<BR><BR>I will defend the right of = the=20 individual to make his own informed choice, even if it is to kill = himself with a=20 bad piece of gear, *provided* his is an informed choice. I think = that=20 courtesy of information obtained from biased literature and URL's such = as the=20 ones you cite, many Inspiration divers have made misinformed=20 decisions.<BR><BR>Joe Citelli</FONT></FONT></BODY></HTML> ------=_NextPart_000_010A_01C2ECCA.EE953520-- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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