Who disagrees with DIR and why?

[LKunze]

Dean, are you referring to bungies on wings? If so I think there are three primary reasons DIR frowns upon bungies on wings. One is that it provides for a potential snag hazaard. If you're in a wreck and rub up on something the bungies could snag. Makes sense to me. Another reason is that the bungee wings will deflate air faster than needed and in the case of a puncture the wing will deflate faster. It will also be harder to inflate the wing at depth manually with your mouth because of the increased resistance of the bungies. Yet another reason that's been highly debated is that the bungie wings have more drag in the water. George Irvine said in the DIR II lectures that bungie wings provide a rougher surface with the ripple effect of the bungies cutting into the wings. A regular wing with a smooth surface will break the water better and have less drag. I think this argument while maybe true is probably pretty tough to prove and even if bungie wings do have more drag in the water it's probably pretty negligable. I guess in my opinion bungies on wings aren't necessary. I agree with DIR in that the most important thing is using a wing that has the proper amount of lift for the type of diving and gear you are using. Example, you don't need 50 or 60 pounds of lift for single tank diving. For around here 30 to 40 pounds of lift is ideal. For diving doubles you want probably 45 to 55 pounds of lift.