never had a problem with my SSI(Scuba Schools International) cardsyou dive alone?Naui since 72. I've managed to survive this long without your help.
i didnt know NAUI taught that
I took the course so I could get air. Try getting air without a naui or padi card.
Diving alone is no more dangerous than flying alone.
That "sharing the air" makes good tv but in reality if you have a serious problem at 90 feet you are going to die with or without a witness.