johndiver999
Contributor
We may be splitting semantic hairs. Yes use of an air2 is a form of primary donate, but outside of SB I have not heard one person using an air2 refer to their setup as a primary donate, they typically say they are using an air2 or a bcd inflator octo. Most folks that talk primary donate as a system are tech divers, a much more limited group.
It seems like your understanding is limited on this topic. If a person is using an Air 2, (and they have a normal configuration) then they MUST do primary donate.
The fact that people don't specifically call it that is irrelevant. The (almost) last thing you want is a buddy trying to breath off your Air 2.
One of the potentially significant problems with an Air 2 is that the diver may fail to understand that they are in a primary donate situation and they fail to emphasize that to the buddy. Incompetence and inappropriate or deficient communication about the presence or use of the Air 2 between buddies is what can make them "dangerous".
I. more often than not, use an Air 2 and when diving with new people, I always try to make a point of telling them that if they need air- they MUST take the regulator from my mouth. I tell them that is the ONLY source of air for them I have and I also tell them that they can be sure I will notice right away if they take the regulator from my mouth. It is somewhat disconcerting about how many buddies are ignorant of this very significant limitation imposed by an Air 2.
Personally, I think banning AIr 2's from recreational diving makes little sense.