scubapro50:This past June I made 14 dives with Don Foster's Shop in Grand Cayman. I was using my Scubapro Mk10 and didn't have an octo attached. The divemaster on the boat started to lecture me on not having an octo on my rig. He stated that it would soon become a law in Grand Cayman that all divers would have to have a octopus if the wanted to dive in Cayman waters. I told him I never heard of that and I and my wife were both experience divers with over 500 logged dives without any serious problems. We have our equipment maintained yearly and have never had a major equipment malfuction while on a dive. He went on to say PADI no longer requires teaching buddy breathing because it was too difficulate and again stressed that was one of the reasons I needed an octo. I explained I did own an AIR2 but prefered not to dive with it using this jacket .... the AIR2 was hooked up to a vest that I seldom use these days. He didn't think hightly of AIR2's either.
If I had your attitude I would probably be dead or seriously injured.. I do alot of deep diving and have had hundreds of dives on my CCR without incident, on one particular dive, do ing a free descent my Diluent first stage blew a high pressure seat, at this point I was approximately 250-260fsw (and sinking)
. I was able to plumb in an alternate gas source and turn the dive safely.. If I had your attitude there would have been no need to carry an alternate since I had hundreds of dives without the slightest problem.. I would probably still be dropping down the wall....
There is no excuse anyone can come up with to not have an alternate second stage whether it be on the same 1st stage or an independent first stage.. Just because you haven't needed it yet doesn't mean you wount need it in the future.. The greatest chance of failure is probably the first dive after you service your gear!
I wouldn't count on buddy breathing.. Unless you practice it with your buddy on a regular basis its a useless skill.. Over the years there have been multiple deaths due to buddy breathing.. Int easy enough when there isn;t an emergency, but put life on the line the stress level jumps..
Even an AIR 2 is better than nothing, If your wife had an issue, you would switch to your Air 2 and give your primary to you wife/buddy (this is also why it is important if you use an air 2 (or similiar) your primary should be on a longer hose)