| Re: Altitude Diving
An important point is to understand the relationship between linear depth (as measured with a tape measure), depth as measured by a surface calibrated depth gauge (like a VR3), and a non-calibrated depth guage (that just uses pressure).
So if the ambient pressure is 0.8Bar, at 2m underwater your standard depth gauge reads 0m.
If you are looking at a set of deco tables, what does "depth" mean ?
Similarly if you add a Rebreather into the mix, how is that calibrated ? With my YBOD I can enter 800mb when I calibrate so it is reading correct. On the surface it would read 0.17 ! On pure oxygen at 3m (linear) underwater the ppO2 is 1.1
You should be very clear on how all this effects your equipment and deco tables before attempting any significant dive at a significant altitude.
Guy |