My view still stands that if your head is below water you should have a redundant source adequate to get you up be that a spare air (if 2cm deep), pony, bigger pony, twinset and so on.
Relying blindly on a buddy who is human so cant be 100% predictable to me is just a senseless escalation of risk.
If you want to count bolt 'n' pray as an option then fair enough but again i dont class that as a useful option for anything deeper than 10-15ft in my case.
For my own planning i dont class bolt 'n' pray at all as a safe option so i dont personally accept that as an option for me. The rest of my dives are either with a pony, twinset or twinset with stages depending on depth and duration. Even if its only a 10m i want to make sure i have enough redundant gas to get myself to the surface at a safe ascent rate and hopefully with a safety stop (and if applicable definitely with all deco stops).
Relying blindly on a buddy who is human so cant be 100% predictable to me is just a senseless escalation of risk.
If you want to count bolt 'n' pray as an option then fair enough but again i dont class that as a useful option for anything deeper than 10-15ft in my case.
For my own planning i dont class bolt 'n' pray at all as a safe option so i dont personally accept that as an option for me. The rest of my dives are either with a pony, twinset or twinset with stages depending on depth and duration. Even if its only a 10m i want to make sure i have enough redundant gas to get myself to the surface at a safe ascent rate and hopefully with a safety stop (and if applicable definitely with all deco stops).