ScubaDoo83
Contributor
Single tank, single first stage... for the time being anyway.A single tank with a single first stage or a single tank with two first stages or two tanks?
The same safety procedures apply to the air2 just the same.An octo that you have not used during your dive remains an untested unreliable thing. Always use your backup regulator on every dive to make sure it actually works - even under water and even at depth.