An instructor told me that I shouldn't sling a pony bottle because that would be a stage which would be technical diving. He said my pony bottle has to be attached to my main tank or else it's a stage and its a tech dive.
Especially if its two al80 stages. Is it possible to do a recreational dive with doubles and two al80 stages? I think you can, I just drifted for 3 hours 30ft deep and it was a nice rec dive within NDL, but he says that its tech gear so its a tech dive, but I learned in my PADI OW that tech means deeper than 130ft or past NDL.
What do you say?