Quote:
| Originally Posted by Mark Chase The actual dive on the VR3 will almost always have less deco than the planned dive, as the actual dive depths are almost always shallower than the estimated dive depth. |
Sounds like an estimation/contingency planning issue more than anything else.
Quote:
| Originally Posted by Mark Chase As an example here is a dive on the Duke planned for
35mins at 55m |
Well if I run it on V-Planner (VPM-B, +2 conservatism, 1m/min ascent form 6m - surface) I get a total run time of 105mins for 37mins BT at 57m on 18/45 with 50% & O2 for deco gases (you didn't specify so I assumed you would make good choices
) Much the same as your profile (as far as I can see).
37mins at 53m (more realistic average depth) (with conservatism at +1 given slow ascent to surface) I get 93mins runtime. More than the 10 minute advantage you say the VR3 gives.
In a nutshell, I do not believe it is the lump of Al (for two) on your wrist which provides the perceived advantage.
The flexibility comes from understanding and planning. If I wanted to go a couple of metres deeper to see something I'd okay it with the team and then we'd add a little to the deco as necessary.