Quote:
| Originally Posted by Steve S ...I did my BSAC advanced nitrox with a 15lt and 3lt backmounted pony, the same year I did my IANTD advanced nitrox with independent twin 10's and a stage rigged 3lt, I did my ERD with inverted twin 12's and a 7lt stage. ... |
I think looking at the OP's profile (ScotSAC SD) this progression is going to be something like sensible. Use the current pony rig for the gas switching (I am assuming that ScotSAC, like BSAC does not allow accelerated deco? Someone put me right please)
Move onto accelerated deco later and move onto twins at that time.
By using a pony mixture with a MOD that does not exceed the dive depth at 1.6ATA you can still use it as an emergency redundant gas source. (ie 30m dive: air backgas EAN40 or less in the pony)
Again if you are doing actual decompression dives of more than a minute or two deco, a single 12 is inadequate backgas and a 3L bailout/pony is inadequate safety so the current setup is academic, you will be diving twins.
Chris