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Scuba Forum / Scuba Locations / September 2004Nitrox at BuddyDive
Hey guys, We are planning a trip to Bonaire mid-December. I may add the Nitrox option. Just wondering if (a) their fills are reasonably accurate, (b) it's fairly convenient to get your Nitrox tanks, and (c) if they have an analyzer available, or one must bring one's own (okay, I confess I still don't have my own ... do I need to buy one to dive safely/conveniently on EAN at BuddyDive?) Tanks, -Chris- > We are planning a trip to Bonaire mid-December. I may add the Nitrox > option. Just wondering if (a) their fills are reasonably accurate, (b) > it's fairly convenient to get your Nitrox tanks, and (c) if they have > an analyzer available, or one must bring one's own (okay, I confess I > still don't have my own ... do I need to buy one to dive > safely/conveniently on EAN at BuddyDive?) If you don't trust 'em to get the mix right, why would you trust 'em to keep their analyzer working right? <g> You're the one diving the mix; you owe it to yourself to make sure you know what it is.  SignaturePete Becker Dinkumware, Ltd. (http://www.dinkumware.com) >>We are planning a trip to Bonaire mid-December. I may add the Nitrox >>option. Just wondering if (a) their fills are reasonably accurate, (b) [quoted text clipped - 6 lines] > keep their analyzer working right? <g> You're the one diving the mix; > you owe it to yourself to make sure you know what it is. Good question, and is the same one I asked myself just before I got my own analyser. Signaturejer email reply - I am not a 'ten' "All that we do is touched with ocean, yet we remain on the shore of what we know." -- Richard Wilbur > Hey guys, > > We are planning a trip to Bonaire mid-December. I may add the Nitrox > option. Just wondering if (a) their fills are reasonably accurate, Filling accuracy has nothing to do with it. Even you ger "EAN32", it is always between 31-33% and it is your OBLIGATION to make your own measurement and DO NOT RELAY on the measurement made by them. If they don't provide you an analyser, or object or show big surprise if you request it, such simply don't use their gas, because they are not reliable. Haven't you been taught this on your Nitrox course? I would like to add even more: you should make a measurement just before the dive. Especially in case of many divers on the boat, some of them using air, some Nitrox, some custom mixes, you should not accept a common practice, which is to measure the gas in the base, than put a tape or tak on the bottle. This is may be good, in case you have your own bottles, which are unique and can not be mixed up, but not in case you rent the bottle from the center, because usually they have all the same. You should request an analyser to be on the boat and check the gas AFTER you have your jacket already fixed to the bottle. Only in such case you can be sure what you breathe. (b) > it's fairly convenient to get your Nitrox tanks, and (c) if they have > an analyzer available, If they don't have one, they can't make any mix. If than they offer something other than air, you shouldn't use any of their gas, because you may get anything from 21-100% O2 in the tank and you will never know what do you have. or one must bring one's own It must be in the base if they provide Nitrox. If they don't have it - don't dive with them. (okay, I confess I > still don't have my own ... do I need to buy one to dive > safely/conveniently on EAN at BuddyDive?) If you have a few millions to spare, I can give you my account number :D You can have your own of course, but it is not mandatory. It is a simple (even primitive) device, which you can make even by yourself. If you are prudent, you should check only how old the sensor is - generally it can stand not much more than one year of usage (I think some can be used max 2 years, but use max 1 year as a benchmark). > Tanks, > -Chris- Regards, Shrek >> Hey guys, >> [quoted text clipped - 17 lines] > AFTER you have your jacket already fixed to the bottle. Only in such >case you can be sure what you breathe. Can you explain why this is the case? Does the air separate in the tank? The curious need to know. >(b) >> it's fairly convenient to get your Nitrox tanks, and (c) if they have [quoted text clipped - 22 lines] >Regards, >Shrek Signaturedillon When I was a kid, I thought the angel's name was Hark and the horse's name was Bob. > Can you explain why this is the case? Does the air separate in the > tank? The curious need to know. No, he can't. Cattle don't understand nitrox. Signature"We're going to rush the hijackers." -Jeremy Glick, aboard United Airlines flight 93, September 11, 2001 > >I would like to add even more: you should make a measurement just before > >the dive. Especially in case of many divers on the boat, some of them [quoted text clipped - 9 lines] > Can you explain why this is the case? Does the air separate in the > tank? The curious need to know. Well, there's a possibility that if the tank was filled just before you measured it the gas might not have mixed completely, so by waiting you get a better number. Of course, you're supposed to allow for that in the first place, and not measure tanks that have just been filled by partial pressure. It sounds more like the idea is to eliminate the risk that someone switched your label to a different tank. SignaturePete Becker Dinkumware, Ltd. (http://www.dinkumware.com) > > Can you explain why this is the case? Does the air separate in the > > tank? The curious need to know. > > Well, there's a possibility that if the tank was filled just before you > measured it the gas might not have mixed completely, so by waiting you > get a better number. Oh my god... Signature"We're going to rush the hijackers." -Jeremy Glick, aboard United Airlines flight 93, September 11, 2001 > > > Can you explain why this is the case? Does the air separate in the > > > tank? The curious need to know. [quoted text clipped - 8 lines] > > god... PLONK. SignaturePete Becker Dinkumware, Ltd. (http://www.dinkumware.com) > > > > Can you explain why this is the case? Does the air separate in the > > > > tank? The curious need to know. [quoted text clipped - 10 lines] > > PLONK. We're very proud. He's slow, but all cattle are slow. Signature"We're going to rush the hijackers." -Jeremy Glick, aboard United Airlines flight 93, September 11, 2001 >> >I would like to add even more: you should make a measurement just before >> >the dive. Especially in case of many divers on the boat, some of them [quoted text clipped - 16 lines] >pressure. It sounds more like the idea is to eliminate the risk that >someone switched your label to a different tank. What? Perhaps you should learn a few gas law. Gases don't behave like liquids. There's no mixing time. I actually cured one shop monkey of rolling tanks by having him take a measurement immediately after a fill and after "mixing up" the gases. Guess what happened. Signaturedillon When I was a kid, I thought the angel's name was Hark and the horse's name was Bob. > What? Perhaps you should learn a few gas law. Gases don't behave > like liquids. There's no mixing time. Which gas law tells you that? Mixing takes place either because you've got turbulent flow as the second gas comes in or through diffusion afterwards. If you have a smooth incoming stream mixing takes place mostly through diffusion, and that isn't instantaneous. The rate of diffusion across a boundary is proportional to the difference in partial pressures at that boundary. > I actually cured one shop > monkey of rolling tanks by having him take a measurement immediately > after a fill and after "mixing up" the gases. Guess what happened. Since you're telling the story in this context, obviously the measurement was dead on. Which proves that that time, the measurement was dead on. SignaturePete Becker Dinkumware, Ltd. (http://www.dinkumware.com) Thanks for your replies. Unfortunately, they helped me not at all -- didn't need a Nitrox primer. I guess I buy an analyzer or just wait and see if a reliable one is on hand when I get there, before buying the Nitrox package. > Thanks for your replies. Unfortunately, they helped me not at all -- > didn't need a Nitrox primer. I guess I buy an analyzer or just wait > and see if a reliable one is on hand when I get there, before buying > the Nitrox package. May of 2003 they had a color code system I thing green was 32% and yellow was 36. At the bottel pickup in the parking lot there was a O2 analyzer by taped to the door, by the dock there was one on the wall. the o2 analyer was not off it matched my O2 analyer. But becuase there are so many people diving it is best that you check your tanks ahead of time. by the way they did not like when we put our BCs on the tank before the loaded the tank on bord. > May of 2003 they had a color code system I thing green was 32% and > yellow was 36. At the bottel pickup in the parking lot there was a O2 [quoted text clipped - 3 lines] > ahead of time. by the way they did not like when we put our BCs on > the tank before the loaded the tank on bord. Thanks, Yankeediver. Exactly what I wanted to know. |
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