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Scuba Forum / General / July 2006buying a dive computer
I am thinking of buying a dive computer, I am a very new diver.. anyone recommend an affordable one that I wont be disappointed in? there are so many different types, do most of you have the console or wrist type? TIA  SignatureRob I am thinking of buying a dive computer, I am a very new diver.. anyone recommend an affordable one that I wont be disappointed in? there are so many different types, do most of you have the console or wrist type? TIA Wrist type preferred muchly, and I've been satisfied for years with my Vyper, but I seem to be shopping myself. SignaturePopeye "Best thing for him, really, his therapy was going nowhere." -Dr. Hannibal Lector. www.finalprotectivefire.com > I am thinking of buying a dive computer, I am a very new diver.. anyone > recommend an affordable one that I wont be disappointed in? there are so [quoted text clipped - 3 lines] > Wrist type preferred muchly, and I've been satisfied for years with my > Vyper, but I seem to be shopping myself. does that mean you have one ready to sell cheap? >> I am thinking of buying a dive computer, I am a very new diver.. anyone >> recommend an affordable one that I wont be disappointed in? there are so [quoted text clipped - 5 lines] >> > does that mean you have one ready to sell cheap? :-) That was good. I keep mine for loaners. No, but you should keep an eye on E-Bay. SignaturePopeye "Best thing for him, really, his therapy was going nowhere." -Dr. Hannibal Lector. www.finalprotectivefire.com > I am thinking of buying a dive computer, I am a very new diver.. anyone recommend an affordable one that I wont be disappointed in? there are so many different types, do most of you have the console or wrist type? > TIA Wrist vs console is very much a matter of personal preference. Wrist may be easier to access, but also easier to lose in holes when yer bugging. The single most important feature is how easy it is to read at a glance, especially in low light. Even the cheapos have a ton of features that you will never use (or even figure out how to access). My advice is to get the cheapest one you can find with a large, basic display. Oceanic makes a good cheap one. They have had some leakage problems in the past, but they have always made good on defects quickly and with no hassle. m > My advice is to get the cheapest one you can find with a large, basic > display. Oceanic makes a good cheap one. They have had some leakage > problems in the past, but they have always made good on defects quickly > and with no hassle. > > m like this one? http://cgi.ebay.com/OCEANIC-DATAMAX-SPORT-DIVE-COMPUTER-WRIST-MOUNT-NEW_W0QQitem Z280000836594QQihZ018QQcategoryZ50882QQssPageNameZWDVWQQrdZ1QQcmdZViewItem >> My advice is to get the cheapest one you can find with a large, basic >> display. Oceanic makes a good cheap one. They have had some leakage >> problems in the past, but they have always made good on defects quickly >> and with no hassle. > like this one? > http://cgi.ebay.com/OCEANIC-DATAMAX-SPORT-DIVE-COMPUTER-WRIST-MOUNT-NEW_W0QQitem Z280000836594QQihZ018QQcategoryZ50882QQssPageNameZWDVWQQrdZ1QQcmdZViewItem That's the one button, air only version of the one I use. It's not a bad computer, but I still recommend a nitrox version over the air only one. I also recommend the two button model over the one button model. Two buttons lets you change some things you can't access on the one button version and access things you can do on both more conveniently. I have a simulator for the nitrox version of the computer you found. It does everything the computer does, pretty much the same way the computer does it. If you'd like a copy to play with, e-mail me from your real e-mail address and I'll sent you one. Remove the number from the address shown in this message to avoid my spam trap message rule. Be sure to put something like Oceanic Simulator in the subject line so I don't delete your request without reading it. Lee Best kind to get is a very large 3 guage console, air integrated, with a 60" HP hose. Route the hose alongside the tank, left side, then between your legs and up to clip off at the lower left nipple "D" ring. Make sure it has very large numbers, a SPG below it for redundancy, and of course top it with a compass. Instead of this, may want to consider just buying a damn bottom timer, learn how to use your tables, and get some dive experience first. Get the computer when you're ready to use it as a tool, not a crutch, and get one with a guage mode. Curtis >> I am thinking of buying a dive computer, I am a very new diver.. anyone >> recommend an affordable one that I wont be >> disappointed in? there are so many different types, do most of you have >> the console or wrist type? >> TIA > Wrist vs console is very much a matter of personal preference. Wrist may > be easier to access, but also easier to lose in holes when yer bugging. I'm with Mike on this. I prefer a console mounted, non air integrated computer. I like the console mount because it keeps the computer, as well as the depth gauge and compass, together with the regulator. It's harder to forget to bring it along. it's also better for those that chose to wear something else on their wrist, a watch, backup computer, whatever. Mike mentioned the issue of bugging. His point, which is a factor for me, as well, is that when you reach into a whole to pull a lobster out, anything on your wrist goes into the hole too. A hole surrounded by rock is not someplace I particularly want my computer to be. Having said that, I have both console and wrist mounted computers. The console and one of the wrist mounts are identical except for the mount. One is a backup for the other. The other wrist mount is a Nitek Duo, used only when I plan on changing gases during a dive. That means I either don't turn the console computer on or I bend it (make it think I've violated some portion of my required deco). > The single most important feature is how easy it is to read at a glance, > especially in low light. Even the cheapos have a ton of features that you > will never use (or even figure out how to access). Personally, the most important feature to me is what the computer shows and when. As Mike indicates, most modern dive computers provide a lot of information. I have specific preferences for what I want to see, when. For example, I want to see my current depth, dive time and a graphic display of N2 and O2 loading all the time. One I am in deco status, I also want access to data on my first stop and time to reach the surface safely. > My advice is to get the cheapest one you can find with a large, basic > display. Oceanic makes a good cheap one. They have had some leakage > problems in the past, but they have always made good on defects quickly > and with no hassle. I second the Oceanic recommendation. I have two of the hockey puck style Oceanics (one's actually a Genesis, which is made by the same company). Mine are one button computers, which I don't recommend. They make a two button model of the same computer that is easier to use than mine are. Since Mike didn't say it, I will. Consider buying a nitrox capable computer. You may not be interested right now, but you probably will be in the future. The difference in cost today is much less than the cost of a new computer will be when you move up to nitrox. Lee >> I am thinking of buying a dive computer, I am a very new diver.. anyone recommend an affordable one that I wont be disappointed in? there are so many different types, do most of you have the console or wrist type? >> TIA [quoted text clipped - 13 lines] > >m I'm looking at an Oceanic. Seems like a good maching with all the features I need and very few that I don't. My Aladdin Pro has served me well for the last 14 odd years, but if I'm going to dive nitrox, might as well get a nitrox computer. Diving nitrox on air tables is a great safety measure, as long as you observe MOD. Signaturedillon JAFO > I'm looking at an Oceanic. Seems like a good maching with all the > features I need and very few that I don't. My Aladdin Pro has served > me well for the last 14 odd years, but if I'm going to dive nitrox, > might as well get a nitrox computer. Diving nitrox on air tables is a > great safety measure, as long as you observe MOD. I like mine, but I'd like the one with two buttons better. Genesis, Aeris and probably others, offer the same computer with a slightly different display layout. Lee I'd suggest a hockey puck with nitrox capability--you'll eventually go that way. You can wrist or console it, your preference. All made by the same company (used 2B Pelagic, are they still around?) and are sold by Sherwood, Oceanic, Genesis, and probably a few others. User changeable batteries and very high volume sellers (you'll see a lot of them on dive boats). They can be had semi-cheap on eBay (~$150 for a nitrox version, if you get lucky). Suggest not insulting Viper owners, asking if they are selling one "cheap" ... ;-) -- although the Devil Dog did take the high road on that one... I've also got a Suunto (Cobra) -- very feature rich and a more modern algorithm (for what it's worth, it's all math...), but generally, working RGBM computers are not cheap. 'course if you're a long-range thinker, you could just get a VR3 and get it over with. Probably won't find one of those cheap. Well, no "probably" about it. Have fun shopping and take your time -- there's lots of other stuff out there to spend your money on also. SignatureRapid Rick "Just Dive, Baby" I am thinking of buying a dive computer, I am a very new diver.. anyone recommend an affordable one that I wont be disappointed in? there are so many different types, do most of you have the console or wrist type? TIA -- Rob I'd suggest a hockey puck with nitrox capability--you'll eventually go that way. You can wrist or console it, your preference. All made by the same company (used 2B Pelagic, are they still around?) and are sold by Sherwood, Oceanic, Genesis, and probably a few others. User changeable batteries and very high volume sellers (you'll see a lot of them on dive boats). They can be had semi-cheap on eBay (~$150 for a nitrox version, if you get lucky). I'm starting to think you might be making fun of me "Okidiver" <okidiver@cox.net> wrote in message news:Xd0pg.58405$9c6.51044@dukeread11... I'd suggest a hockey puck with nitrox capability--you'll eventually go that way. You can wrist or console it, your preference. All made by the same company (used 2B Pelagic, are they still around?) and are sold by Sherwood, Oceanic, Genesis, and probably a few others. User changeable batteries and very high volume sellers (you'll see a lot of them on dive boats). They can be had semi-cheap on eBay (~$150 for a nitrox version, if you get lucky). I'm starting to think you might be making fun of me... Nope. He's describing a basic, bullet-proof computer, the first one I ever owned (Dacor Nitrox). No, you can't buy it. :-) I keep it for a loaner... SignaturePopeye "Best thing for him, really, his therapy was going nowhere." -Dr. Hannibal Lector. www.finalprotectivefire.com >> Okidiver wrote >> I'd suggest a hockey puck with nitrox capability--you'll eventually go >> that way. You can wrist or console it, your preference. [quoted text clipped - 4 lines] >> can be had semi-cheap on eBay (~$150 for a nitrox version, if you get >> lucky). > I'm starting to think you might be making fun of me... Nope. The computer I sent you a simulator for is one of the computer's Okidiver is referring to. They're informally known as hockey pucks because they are about the same size and shape. One of mine is an Oceanic, the other a Gensis. Okidiver missed the Aeris computers made by the same company. Lee ******************* I am thinking of buying a dive computer, I am a very new diver.. anyone recommend an affordable one that I wont be disappointed in? there are so many different types, do most of you have the console or wrist type? TIA ******************* Please turn off the HTML for posting to newsgroups. You have a Homo Sapiens Mk I Model 0 installed at the factory. Other than that, just buy the cheapest one. > You have a Homo Sapiens Mk I Model 0 installed at the factory. but I really wonder sometimes about those Monday AM, Wed lunch & Friday PM installations....... > > You have a Homo Sapiens Mk I Model 0 installed at the factory. > > but I really wonder sometimes about those Monday AM, Wed lunch & Friday > PM installations....... I used to install car stereo's for a second job (pampers were expensive!). We had this guy with a Cadillac that was always bitching about a rattle in his dash. We finally got sick of his sh.t and tore the dash almost completely apart (not a small feat with a caddy) trying to fix it. We found an old, glass coke bottle with a note in it; "Took a long time to find this didnt it you rich son of a bitch." We gave him the bottle, the note and a bill for $375. > > > You have a Homo Sapiens Mk I Model 0 installed at the factory. > > [quoted text clipped - 11 lines] > > We gave him the bottle, the note and a bill for $375. That's classic. I love it. >******************* >I am thinking of buying a dive computer, I am a very new diver.. anyone [quoted text clipped - 8 lines] > >Other than that, just buy the cheapest one. Scott, you ;ighten up my day. > >Please turn off the HTML for posting to newsgroups. > > [quoted text clipped - 3 lines] > > > Scott, you lighten up my day. My only goal. >I am thinking of buying a dive computer, I am a very new diver.. anyone recommend an affordable one that I wont be disappointed in? there are so many different types, do most of you have the console or wrist type? >TIA I have a Uwetec Prime that I think is pretty good. I had it measure 35 degrees which someone here took offense to here. Anywho, it consistently read 39 degrees at 50 feet but dropped to 35 when we hit a very cold spot at 45 feet. It's a spring fed lake and I'm assuming that I ran into the spring water. In subsequent dives on that same lake, I've also registered 39 degrees but never hit 35 nor have I "felt" that temperature. > >I am thinking of buying a dive computer, I am a very new diver.. anyone recommend an affordable one that I wont be disappointed in? there are so many different types, do most of you have the console or wrist type? > >TIA > [quoted text clipped - 5 lines] > lake, I've also registered 39 degrees but never hit 35 nor have I > "felt" that temperature. No offence, but aren't you a bit new to be recommending dive computers? > No offence, but aren't you a bit new to be recommending dive computers? Not if you ask him. >> I have a Uwetec Prime that I think is pretty good. I had it measure >> 35 degrees which someone here took offense to here. Anywho, it [quoted text clipped - 3 lines] >> lake, I've also registered 39 degrees but never hit 35 nor have I >> "felt" that temperature. > No offence, but aren't you a bit new to be recommending dive computers? He certainly is if he thinks the most important aspect worth mentioning is how it measures temperature. Lee > No offence, but aren't you a bit new to be recommending dive computers? No offense from me either, but isn't just recommending a dive computer a sign of being a bit "new"? (unless it's the style I described earlier in this thread, that has proven to set a few bottom time records in Lake Michigan) Curtis Magilla wrote >> No offence, but aren't you a bit new to be recommending dive computers? > > No offense from me either, but isn't just recommending a dive computer > a sign of being a bit "new"? Nope. >>> No offence, but aren't you a bit new to be recommending dive computers? >> >> No offense from me either, but isn't just recommending a dive computer >> a sign of being a bit "new"? > > Nope. From Star's post "You also will find, once you've invested in all the bells and whistles and discarded them, that you much prefer simplicity UW. Consider the BP/wing, long hose, bungee-ed backup, SPG instead of a console, and a simple depth gauge and wrist compass. Add a computer if you like later; one that you can plug in at least 3 mixes up to 50% if you want top end, if not, one that you can plug in varying mixes up to 40% for recreational diving." I _really_ like that part about adding a computer later (even if I wouldn't waste money on one to plug in 3 different gas switches. If you are using 2 or more deco gasses, damn sure should be cutting your own). But, from Al Well's post "but unfortunately, I've found it is really hard to talk a new diver out of the whiz-bang gear he has his heart set on. Some of them come around later, after they see it in real life on real dives (not a demo in a quarry or spring)." I agree, and feel that the fancy computer is part of the "whiz bang gear" tossed at new divers, even encouraged by those who feel so strongly we should train OW divers better. Curtis "Magilla" wrote: > From Star's post > [quoted text clipped - 9 lines] > wouldn't waste money on one to plug in 3 different gas switches. If you are > using 2 or more deco gasses, damn sure should be cutting your own). Agreed. Was just pointing out what's available. Do not have fancy computer; use old Dacor Equinox hockey puck when appropriate. Prefer to spend $$ on new sets of doubles :-) * >> I _really_ like that part about adding a computer later (even if I >> wouldn't waste money on one to plug in 3 different gas switches. If you >> are >> using 2 or more deco gasses, damn sure should be cutting your own). > Agreed. Was just pointing out what's available. Do not have fancy > computer; use old Dacor Equinox hockey puck when appropriate. Prefer to > spend $$ on new sets of doubles :-) Ah, the never ending real purchases. Have 3 sets of dubs, now looking to add some stages. Curtis "Magilla" wrote >>>> No offence, but aren't you a bit new to be recommending dive computers? >>> [quoted text clipped - 4 lines] > > From Star's post > Add a computer if you like later; one that you can plug in at least 3 > mixes up to 50% if you want > top end, if not, one that you can plug in varying mixes up to 40% for > recreational diving." Later, as in when you're more experienced, not as new a diver? > I _really_ like that part about adding a computer later (even if I > wouldn't waste money on one to plug in 3 different gas switches. If you > are using 2 or more deco gasses, damn sure should be cutting your own). Yours were cut using a computer. Hers were created using a computer you take with you. Both use a computer. > "but unfortunately, I've found it is really hard to talk a new diver out > of the whiz-bang gear he has his heart set on. Some of them come around > later, after they see it in > real life on real dives (not a demo in a quarry or spring)." > I agree, and feel that the fancy computer is part of the "whiz bang gear" > tossed at new divers, even encouraged by those who feel so strongly we > should train OW divers better. Owning or using a computer does not preclude better training. Lee > Later, as in when you're more experienced, not as new a diver? Well, if you HAVE to have one, later is better, tool not crutch. You already know I no longer use one, was a mistake when I did. > Yours were cut using a computer. Hers were created using a computer you > take with you. Both use a computer. I ride in the right hand seat in a small airplane, Grummy rides in the left hand seat. We're both "using" the airplane. See a difference? > Owning or using a computer does not preclude better training. Not by itself, just makes it easier to shrug off that part of training and just say "follow the dive computer, you'll never use this sh.t anyways". Curtis Magilla wrote >> Later, as in when you're more experienced, not as new a diver? > Well, if you HAVE to have one, later is better, tool not crutch. You > already know I no longer use one, was a mistake when I did. If you had said "WANT" to have one, I'd probably agree. You're aware that I don't support programs that don't teach tables, going straight to a computer instead. I believe understanding the tables has a very positive, important, effect on a diver's understanding of gas and decompression issues. If the choice were whether to teach only tables or only computers, I'd vote for tables every time. Of course, that's not the only choice. Computers are a tool and, in my opinion, a good one for those whose diving is facilitated by such a tool. Most divers find that diving with a computer is more convenient than diving without one. Most divers never progress the point where a computer no longer works as well, let alone better, than tables. It's not a matter of new or experience diver, it's a matter of the kind of diving being done and the distinction, even there, is beginning to blur. >> Yours were cut using a computer. Hers were created using a computer you >> take with you. Both use a computer. > I ride in the right hand seat in a small airplane, Grummy rides in the > left hand seat. We're both "using" the airplane. See a difference? Not the same. Try this one instead. You take out your charts, weather reports, dividers, rules and books and plot a flight plan that you will stick pretty close to. Grumman figures out where he wants to wind up, what the rules are for the areas he'll cross on the way and turns on his GPS. >> Owning or using a computer does not preclude better training. > Not by itself, just makes it easier to shrug off that part of training and > just say "follow the dive computer, you'll never use this sh.t anyways". You'll get no argument from me. I'm the one that very recently stated that my standards are higher. Argue this one with those that believe training is just fine as it is. Lee > Not the same. Try this one instead. You take out your charts, weather > reports, dividers, rules and books and plot a flight plan that you will > stick pretty close to. Grumman figures out where he wants to wind up, what > the rules are for the areas he'll cross on the way and turns on his GPS. Actually, I'm more likely to be using a LORAN crossreferenced to paper charts to ensure that I don't get too close to certain types of airspace... Sometimes, I'll have a handheld GPS as a backup... Triangulation via VORs is possible, but I seldom use it these days... >> Not the same. Try this one instead. You take out your charts, weather >> reports, dividers, rules and books and plot a flight plan that you will >> stick pretty close to. Grumman figures out where he wants to wind up, >> what >> the rules are for the areas he'll cross on the way and turns on his GPS. > Actually, I'm more likely to be using a LORAN crossreferenced to paper > charts to ensure that I don't get too close to certain types of > airspace... Sometimes, I'll have a handheld GPS as a backup... > Triangulation via VORs is possible, but I seldom use it these days... OK, make it me, in my boat, and my charting GPS. After all, no mariner, or pilot, needs a GPS or even a Loran, but they're damned handy to have anyway. Lee > OK, make it me, in my boat, and my charting GPS. After all, no mariner, or > pilot, needs a GPS or even a Loran, but they're damned handy to have anyway. Yep, you can always use a sextant, compass, charts and such... Radio navigation capabilities are not a necessity for boating, but it sure makes things easier... I've made crosscountry flights without LORAN or GPS before, just using course,projected wind speeds & directions, wind correction angle, and airspeed in combination with a map, but these days, I tend to use some sort of radio navigation equipment for flights outside the local area... Hell, even for flights inside the local area, I'll have my LORAN turned on so that when I need to give position reports, I'm at least accurate with them and to give me a better level of control in skirting the edges of controlled airspace without having to contact ATC... >> Owning or using a computer does not preclude better training. > > Not by itself, just makes it easier to shrug off that part of training > and just say "follow the dive computer, you'll never use this sh.t > anyways". And the -vast- majority of divers never do. Those that do, will take advanced training, and learn their tables and gasses. Like all those foolish equations we learned in Nitrox class. I have around 1000 nitrox dives, and I never used them once. Not once. It was a gross waste of my time. SignaturePopeye "Best thing for him, really, his therapy was going nowhere." -Dr. Hannibal Lector. www.finalprotectivefire.com > Like all those foolish equations we learned in Nitrox class. > I have around 1000 nitrox dives, and I never used them once. > Not once. > It was a gross waste of my time. I use them during the planning stage for most dives planned to depths beyond what works with 36% and all dives planned for what works with 32%. >> Like all those foolish equations we learned in Nitrox class. >> I have around 1000 nitrox dives, and I never used them once. [quoted text clipped - 3 lines] > I use them during the planning stage for most dives planned to depths > beyond what works with 36% and all dives planned for what works with 32%. Van der Waals long division equations for partial pressure blending of partially filled tanks??????????????? I use the MOD chart, not the -equations from scratch-, but I'm at a loss to understand what planning you mean. If I have to top tanks, I use a computer program not a scratch pad. > >> Like all those foolish equations we learned in Nitrox class. > >> I have around 1000 nitrox dives, and I never used them once. [quoted text clipped - 6 lines] > Van der Waals long division equations for partial pressure blending of > partially filled tanks??????????????? Odd, I've never taught those in nitrox class. We do teach the theory behind MOD, END, EAD, etc to promote an understanding of those nice lil charts and tables. I'm sorry if you thought that was a waste of your time, but I will not teach anything withont a reasonable understanding of WHY it works, at the appropriate level. And you never took *my* nitrox class. Did yours work through a complete calculation of your actual PO2's during your 2 dives? Did you see firsthand how difficult it is to tox your self on recreational dives, even repetitive ones? > I use the MOD chart, not the -equations from scratch-, but I'm at a loss > to understand what planning you mean. I will agree that for choosing a best mix, a table can usually get you pretty much ball park. I would consider this planning. If a table isn't handy, however, I can always figure it out, and I like being able to do that. > If I have to top tanks, I use a computer program not a scratch pad. If available, yes. I'm academically-minded to want to understand the algorithms the program uses, though. >> >> Like all those foolish equations we learned in Nitrox class. >> >> I have around 1000 nitrox dives, and I never used them once. [quoted text clipped - 16 lines] > actual PO2's during your 2 dives? Did you see firsthand how difficult > it is to tox your self on recreational dives, even repetitive ones? Yah. I took an IANTD nitrox class in '97. Maybe they don't teach that stuff in other agencies. http://en.wikipedia.org/wiki/Van_der_Waals_equation >> I use the MOD chart, not the -equations from scratch-, but I'm at a >> loss [quoted text clipped - 4 lines] > isn't handy, however, I can always figure it out, and I like being able > to do that. I got tables everywhere. IANTD makes the coolest flexible ones. >> If I have to top tanks, I use a computer program not a scratch pad. > > If available, yes. I'm academically-minded to want to understand the > algorithms the program uses, though. But you're a math geek. :-) >> I use them during the planning stage for most dives planned to depths >> beyond what works with 36% and all dives planned for what works with 32%. > Van der Waals long division equations for partial pressure blending of > partially filled tanks??????????????? No. I have Van der Waals stuff somewhere, but I don't normally use them. Those that fill my tanks apparently do since they manage to get my O2 percentages correct, even at pressures in excess of 3,500 psi. It's sufficient to my needs to test the gas and know what the O2 percentage is. > I use the MOD chart, not the -equations from scratch-, but I'm at a loss > to understand what planning you mean. I start with my depth and PPO2 preferences and plan my gas for the dive I'm doing. I do not limit myself to the NOAA standard mixes. Most often, I use the own Excel spreadsheet I developed for the purpose, but if I don't happen to have a computer, or my PDA, with me, I do them on a calculator almost as easily. My phone has a calculator and a solar powered one lives in the box with my O2 analyzer. > If I have to top tanks, I use a computer program not a scratch pad. I enjoy math, but not so much that I'll do calculations by hand, on a scratch pad, that I can do on a calculator more easily. Lee MOD 32% = 110 @ 1.4PPO2 MOD 36% = 90 @ 1.4PPO2 That's all you need to know. And that if you try *really* hard, you might get bent diving those gasses on an AL80. > MOD 32% = 110 @ 1.4PPO2 > > MOD 36% = 90 @ 1.4PPO2 > That's all you need to know. > And that if you try *really* hard, you might get bent diving those gasses > on > an AL80. Or maybe even toxed diving either one at 140 feet or more. Not everybody breathes trimix on dives greater than 100 fsw. Lee > > MOD 32% = 110 @ 1.4PPO2 > > [quoted text clipped - 8 lines] > Or maybe even toxed diving either one at 140 feet or more. Not everybody > breathes trimix on dives greater than 100 fsw. MOD? At 140 you should use 25/35 or 21/40. And if you are not diving helium at those depths, get with it. 2006 after all. >> Or maybe even toxed diving either one at 140 feet or more. Not everybody >> breathes trimix on dives greater than 100 fsw. > MOD? 1.68 for 32% at 140, which is approximately where the bottom is on the Spiegle Grove. I used 28%. > At 140 you should use 25/35 or 21/40. > And if you are not diving helium at those depths, get with it. > 2006 after all. Like I said, not everyone uses trimix below 100 fsw. Anyway, the response was to Popeye who mentioned that he doesn't use the formulas and asked what planning I was talking about when I said I do. Since you brought up the issue, if I were using trimix, I'd be using the formulas for that too. Lee > 1.68 for 32% at 140, which is approximately where the bottom is on the > Spiegle Grove. I used 28%. 28% OEA is the wrong mix. And I use helium for anything deeper than 60 feet. > > 1.68 for 32% at 140, which is approximately where the bottom is on the > > Spiegle Grove. I used 28%. > > 28% OEA is the wrong mix. > > And I use helium for anything deeper than 60 feet. mmmmm - a bit of overkill for me - i'll want He after 100-120, depending. * > mmmmm - a bit of overkill for me - i'll want He after 100-120, > depending. Helium is not just for breakfast anymore. I rarely dive with anything except mix. 25/35 for most, 21/40 if I am feeling randy. It helps me keep my youthful glow. If I cant *easily* do the dive on 16/50 and an AL80 full of 50%, I dont do the dive. >>> I use them during the planning stage for most dives planned to depths >>> beyond what works with 36% and all dives planned for what works with [quoted text clipped - 27 lines] > I enjoy math, but not so much that I'll do calculations by hand, on a > scratch pad, that I can do on a calculator more easily. As I thought. While you still go a little further than me, you're not doing it with a pencil. The equations I cited are useless knowledge to the masses. SignaturePopeye "Best thing for him, really, his therapy was going nowhere." -Dr. Hannibal Lector. www.finalprotectivefire.com > While you still go a little further than me, you're not doing it with a > pencil. True, but as a bit more support, I had to know, or be able to access the formulas, to put them into the Excel spreadsheet I usually use. > The equations I cited are useless knowledge to the masses. I'm not sure "useless" is the word I would use. I do agree, however, that they are not used by many divers. On the other hand, I think those that do use them, have a better handle on the issues they relate to and, of course, the formulas are also useful in assessing when and how to use trimix. Lee >> While you still go a little further than me, you're not doing it with a >> pencil. [quoted text clipped - 9 lines] > course, the formulas are also useful in assessing when and how to use > trimix. Here's my Nitrox formula: MOD = life/death<luck x hangover. I try not to violate my MOD by more that 10 or 20 ft, mostly because that beeping that I can't hear seems to bother everyone else. :-) > Here's my Nitrox formula: MOD = life/death<luck x hangover. > > I try not to violate my MOD by more that 10 or 20 ft, mostly because that > beeping that I can't hear seems to bother everyone else. :-) Ah, the joys of tinnitus. >> Here's my Nitrox formula: MOD = life/death<luck x hangover. >> [quoted text clipped - 3 lines] > > Ah, the joys of tinnitus. Since I stay pretty motionless, my first clue is usually when people swim up and shake me. :-) SignaturePopeye "Best thing for him, really, his therapy was going nowhere." -Dr. Hannibal Lector. www.finalprotectivefire.com > The equations I cited are useless knowledge to the masses. Maybe, but they divert attention from some that are important to the masses. Curtis >> The equations I cited are useless knowledge to the masses. > > Maybe, but they divert attention from some that are important to the > masses. Which ones? :-) SignaturePopeye "Best thing for him, really, his therapy was going nowhere." -Dr. Hannibal Lector. www.finalprotectivefire.com > Van der Waals long division equations for partial pressure blending of > partially filled tanks??????????????? Absolutely over the top and ridiculous for nitrox at the pressures we use. Teaching the basic equations is useful for understanding the relationships, but I concentrate on the tables for everyday use. Long division? I thought you called it "guzintas" in TN > > Van der Waals long division equations for partial pressure blending of > > partially filled tanks??????????????? [quoted text clipped - 6 lines] > > Long division? I thought you called it "guzintas" in TN Use Navy air tables, Calculate for EAD, reverse the 10 and 20 foot stops. >> Van der Waals long division equations for partial pressure blending of >> partially filled tanks??????????????? [quoted text clipped - 6 lines] > > Long division? I thought you called it "guzintas" in TN We call it "Quarry Mix..." EAN 40 - 50% for back gas... :-) >> >I am thinking of buying a dive computer, I am a very new diver.. anyone >recommend an affordable one that I wont be disappointed in? there are so [quoted text clipped - 10 lines] > >No offence, but aren't you a bit new to be recommending dive computers? Perhaps. >>I am thinking of buying a dive computer, I am a very new diver.. anyone >>recommend an affordable one that I wont be disappointed in? there are so >>many different types, do most of you have the console or wrist type? >>TIA > > I have a Uwetec Prime that I think is pretty good. Compared to what? >I had it measure > 35 degrees which someone here took offense to here. Anywho, it [quoted text clipped - 3 lines] > lake, I've also registered 39 degrees but never hit 35 nor have I > "felt" that temperature. >>>I am thinking of buying a dive computer, I am a very new diver.. anyone >>>recommend an affordable one that I wont be disappointed in? there are so [quoted text clipped - 4 lines] > > Compared to what? To the Suunto Octopus and an Aeris console that I've used but I don't remember the model. >>I had it measure >> 35 degrees which someone here took offense to here. Anywho, it [quoted text clipped - 3 lines] >> lake, I've also registered 39 degrees but never hit 35 nor have I >> "felt" that temperature. |
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