drrich2
Contributor
I view it as a 'CESA aid,' whereas in theory a pony bottle ideally has capacity to return you to the point of entry (e.g.: mooring line, anchor), ascend safety, perform a regular safety stop & then exit.
If I were at 100 feet & had an abrupt OOA situation, I'd rather have a Spare Air than not (being mindful a safe ascent rate would put me somewhere close to 2 minutes, possibly starting with having exhaled). I've got one on order; haven't received it yet. Mainly for solo diving. There are distant destinations I probably wouldn't take a pony, and they're not always easy to find for rent.
Richard.
If I were at 100 feet & had an abrupt OOA situation, I'd rather have a Spare Air than not (being mindful a safe ascent rate would put me somewhere close to 2 minutes, possibly starting with having exhaled). I've got one on order; haven't received it yet. Mainly for solo diving. There are distant destinations I probably wouldn't take a pony, and they're not always easy to find for rent.
Richard.