Almitywife:
Just ran the numbers. Assuming I use up most of the tank (11L * 230 = 2530L) on each dive and a 1 hr SI - it does not matter that I do a shallow dive first. Infact, I will dive it on air not nitrox. I just need to be back at the dive shop by 10:15AM. It is nice to plan with VPM-B and dive with VPM-B (Liquidvision X1).
Phil
Decompression model: VPM - B
DIVE PLAN #1
Surface interval = 5 day 0 hr 0 min.
Elevation = 0m
Conservatism = + 3
Dec to 12m (0) Air 15m/min descent.
Level 12m 54:12 (55) Air 0.46 ppO2, 12m ead
Asc to 6m (55) Air -9m/min ascent.
Surface (56) Air -9m/min ascent.
OTU's this dive: 0
CNS Total: 0.0%
2247.4 ltr Air
2247.4 ltr TOTAL
DIVE PLAN #2
Surface interval = 0 day 1 hr 0 min.
Elevation = 0m
Conservatism = + 3
Dec to 25m (1) Nitrox 32 15m/min descent.
Level 25m 33:20 (35) Nitrox 32 1.11 ppO2, 20m ead
Asc to 6m (37) Nitrox 32 -9m/min ascent.
Stop at 6m 0:53 (38) Nitrox 32 0.51 ppO2, 4m ead
Surface (38) Nitrox 32 -9m/min ascent.
Off gassing starts at 14.1m
OTU's this dive: 42
CNS Total: 15.4%
2341.7 ltr Nitrox 32
2341.7 ltr TOTAL
DIVE PLAN #3
Surface interval = 0 day 1 hr 0 min.
Elevation = 0m
Conservatism = + 3
Dec to 20m (1) Nitrox 32 15m/min descent.
Level 20m 38:40 (40) Nitrox 32 0.96 ppO2, 16m ead
Asc to 6m (41) Nitrox 32 -9m/min ascent.
Surface (42) Nitrox 32 -9m/min ascent.
OTU's this dive: 37
CNS Total: 22.2%
2253.7 ltr Nitrox 32
2253.7 ltr TOTAL