Benthic

Here's how I do it--others may vary.

If I'm planning to dive to 140 for 35 min.

Set surface interval to 24hr (or as appropriate)
I leave the starting setpoint field at 0.4. I click "Add Level, diluent, set point" and fill in depth of 140, time of 35, oxygen at 21, helium at 0 and setpoint at 1.3. Click OK. Then go back to the main window and click "Calc." (Note that I have V-planner set to give the last stop at 20 feet)

I get the following:

DIVE PLAN
Surface interval = 1 day 0 hr 0 min.
Elevation = 0ft
Conservatism = + 2

Dec to 140ft (2) Diluent Air 0.40 SetPoint, 50ft/min descent.
Level 140ft 32:12 (35) Diluent Air 1.30 SetPoint, 132ft ead
Asc to 70ft (37) Diluent Air 1.30 SetPoint, -30ft/min ascent.
Stop at 70ft 0:40 (38) Diluent Air 1.30 SetPoint, 43ft ead
Stop at 60ft 1:00 (39) Diluent Air 1.30 SetPoint, 30ft ead
Stop at 50ft 2:00 (41) Diluent Air 1.30 SetPoint, 18ft ead
Stop at 40ft 3:00 (44) Diluent Air 1.30 SetPoint, 5ft ead
Stop at 30ft 4:00 (48) Diluent Air 1.30 SetPoint, 0ft ead
Stop at 20ft 15:00 (63) Diluent Air 1.30 SetPoint, 0ft ead
Surface (63) Diluent Air -30ft/min ascent.

Off gassing starts at 94.6ft

OTU's this dive: 90
CNS Total: 34.1%



DIVE PLAN COMPLETE




Now then, if you wanted to plan for OC bailout at 140 feet, 35 min into the dive, add a second level with the "Add level, diluent, set point" button. On this new level fill in depth at 140, time as 0, oxygen at 21, helium at 0, select the "OC" checkbox, and then click OK. When I hit "Calc" I get the following:


DIVE PLAN
Surface interval = 1 day 0 hr 0 min.
Elevation = 0ft
Conservatism = + 2

Dec to 140ft (2) Diluent Air 0.40 SetPoint, 50ft/min descent.
Level 140ft 32:12 (35) Diluent Air 1.30 SetPoint, 132ft ead
Asc to 70ft (37) Air -30ft/min ascent.
Stop at 70ft 1:40 (39) Air 0.65 ppO2, 70ft ead
Stop at 60ft 3:00 (42) Air 0.59 ppO2, 60ft ead
Stop at 50ft 5:00 (47) Air 0.53 ppO2, 50ft ead
Stop at 40ft 6:00 (53) Air 0.46 ppO2, 40ft ead
Stop at 30ft 10:00 (63) Air 0.40 ppO2, 30ft ead
Stop at 20ft 58:00 (121) Air 0.34 ppO2, 20ft ead
Surface (121) Air -30ft/min ascent.

Off gassing starts at 97.2ft

OTU's this dive: 51
CNS Total: 20.0%

81.2 cu ft Air
81.2 cu ft OC TOTAL


DIVE PLAN COMPLETE




Of course if you wanted to assume that you bailed out at 50 feet on the way up, you could simply change the depth field for your second level. Hope that's helpful.

Brian

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