nlbford:I didn't say their aren't benefits or that it is an appropriate choice for some. My POINT is that labelling a group "bad" because they have a different philosophy is unfair - particularly when other positives go unmentioned. Same thing for if there was a boat that forbids the use of compressed air and only allowed Nirtox. It would be unfair for me to label them "bad" or unsafe because they forbid me to dive compressed air in a safe and reasonable fashion. I simply would say that group is not conducive to my diving style and would look elsewhere and not spend my time labeling their policies as "bad".
And the insinuation that any company that embraces nitrox is "good" is equally incorrect. Just look at the enterprise that inspired this thread. They embrace Nitrox yet ban customers from their shop for not buying from them - that would be "bad" policy if you ask me.
In my experience I have never seen anyone who is of the compressed air camp rally against nitrox people with any venom or vigor, they just say it isn't for me. I have seen numerous nitrox fox vehemently protest against the compressed air group and speak negatively of the approach. I always found that very interesting and quite telling.
The big difference here is that we have one group saying another is "bad" because they don't allow a particular approach while we have another group who simply says that the other approach is not what they do and makes no qualitataive judgements about it.
I am not labeling a group of people bad because they differ with my opinion.
restricting the person to a single tank isn't wrong (provided they allow an alternate air source like a pony, This is for satfety not increasing dive time, If they want to be sure limit the size to say a 30cf tank)
If they allow ANYBODY including the staff to dive SOLO those divers should be properly equipped with totally redundant systems or not allowed to do it period.. At absolute minimum the divers should be using a single tank with an H-valve (and 2 first stages) and a small pony.
Gas selection should be left to the diver, There is nothing wrong with placing limits on the dive profiles. Nitrox has alot of benefits (especially when used to the same limits as air) and very few down sides (the main one being the MOD for the mix, but a diver with reasonable buoyancy control and who pays attention to his/her depth this is a non-issue)
Even running 4 or 5 dives a day to recreation depths and times, getting anywhere near the alowable limits is quite difficult, so this really isn't an issue.
God forbid something happens and the person gets an "underserved hit", bolts to the surface or any other issue that threatens the divers healt, the fact that they were breathing Nitrox inproves the chance of the diver getting away with less or no heath issues.
Breathing Nitrox saturates the blood with oxygen much more readily than AIr does (to do it on air you must go deeper), if a person has any predisposition factors this extra availability of oxygen can be a blessing.
I don't know if you ever took a Nitrox class and if so how complete it was.. If your class really addressed all the issues you most likely would come out with the same opion I am expressing. BTW my nitrox classes take about 12 hours of academics.... The actual caclculations take of only a small percentage of the class, everything else is physiology...