АлександрД
Contributor
Just want to remind
In reality - metric system is much more suitable for fast estimations in diving.
Also exists Ratio decompression - Wikipedia - "a little bit advanced calculations in mind"
So, in my experience, latest times I use just two SPG values:
- "Enough!", or "More than enough!"
and
- "OPS " (or "Upsss...", depends on prononsiations in regions). I say Опаньки (Opan`kee)
and meaning of this two values is very simple.
- Enough - you can relax and just have a dive.
- Ops - you should start to go back to the surface.
Just one adjusting point - pressure, where you deside to be "Ops"
and this point depends on diving conditions.
- for shallow dive - you can keep it without any problems at 50bar (725 psi) or even below.
- for deep dives in the blue - you should keep it at half of the pressure
- for deep dive with slow ascending along the bottom profile - you can keep it at 50 bar - 70 bar (725 - 1015 psi)
- for cave dives - you never should dive to the caves with recreational experience and this methodics
It is just my opinion for easy diving conditions. Never offer this to follow. Just as another way to calculate air reminder.