|
If she is dead set against carrying a pony, get her the spare air.
I have a pony that I carry on deep dives or when I dive an AL80 instead of my HP120.
A pony does you little good if you are unwilling to carry it. If she will carry the spare air on every dive, it is better than a pony that she will not carry.
With all of that being said. I prefer the pony over a spare air. Spare air units come in 2 sizes 1.7 cf and 3 cf.
I have attached a spreadsheet that calculates your minutes of breathing gas at depth for different sized cylinders. All you do is enter your SAC, Pony size, & depth.
__________________
* If you're not the lead dog, the view never changes *
|