I certainly wont certify someone that cant do the mask skills with a normal mask. If they have a purge mask i make them demonstrate they can do all the skills with a normal mask.
My reasons:- purge masks solve a problem that doesnt exist. They are also a crutch. The valves can jam and break meaning they will flood constantly and if the person ever borrows a mask on a trip somewhere you may well have someone claiming to be a qualified diver who in fact cant do a simple mask clear which in my view is dangerous.
My reasons:- purge masks solve a problem that doesnt exist. They are also a crutch. The valves can jam and break meaning they will flood constantly and if the person ever borrows a mask on a trip somewhere you may well have someone claiming to be a qualified diver who in fact cant do a simple mask clear which in my view is dangerous.