Kevin Carlisle
Contributor
yes thats them and im not sure either but regardless i would not feel comfortable using my drysuit as a second type of inflation i feel safer with the dual bladder
Why?? You get more lift from the suit in an emergency.. I happen to know the Director of traninig for Padi, also he is the one who wrote the Padi SMM class. Your shop has told you wrong but if that's what makes you feel comfy spend the extra money.