A bailout scenario is the same dive, abandoned at the end of a level and finished on open circuit with a subset of the gases you carry. It replays the loop descent and bottom exactly, then ascends on that scenario’s gases with the same model, gradient factors and stop grid as the loop plan.
What the planner enumerates
Only Bailout and Diluent + Bailout gases are open-circuit-capable; a
pure diluent is never part of a scenario. For the final level ending, the
planner builds the full set (labelled All bailout gases), each gas alone, and
every combination in between; earlier level endings get only the full set and
the single gases. Four things limit the list.
- More than five open-circuit-capable gases: combinations are dropped, reported
as
More than 5 open-circuit-capable gases - combination scenarios omitted (planned: all gases and each individual gas). - A scenario whose runtime exceeds 5.0 × the loop runtime is dropped as not survivable, with a warning naming how many were dropped; the ones kept are not called survivable.
- With no open-circuit-capable gas the picker is replaced by
Add an OC bailout or diluent bailout gas to plan bailout scenarios.The plan itself still runs: carrying open-circuit bailout is your decision, and a dual-rebreather dive carries none. - Bailout planning runs on Bühlmann and Thalmann. GF Calibration is refused
with
Bailout planning supports the Bühlmann and Thalmann algorithms.
If nothing in a subset can be breathed at the bail depth, the scenario stays on
the loop, holding every stop, until one of its gases becomes available:
Bailout gas not breathable below 30m - this scenario stays on the loop from 55m until 30m. The finding is listed with that scenario’s
warnings.
Reading the picker
The Scenarios picker sits at the left of the row above the profile chart on the Review step, with the plan’s name, time to surface and runtime at its right; reaching it runs the enumeration. Closed, the control is one line naming the current selection; the planner’s note naming a scenario dropped for an unsurvivable runtime sits beneath the row.
Open it and scenarios are grouped by bail point, each row carrying its label and time to surface. The loop toggles independently; at most one scenario is active, and the selection can never be empty. A selected scenario is drawn over the loop as a dashed line, with the decompression ceiling and gas timeline hidden; toggle the loop off and it becomes the main profile. The schedule table, gas cards and tissue graph follow the selection.
Bailout SAC rates
Bailout volumes come from the Bailout Breathing Rates card in Work Rates. Bailout Working SAC (L/min) is charged from the bail point until the Settling Window has elapsed at the first decompression stop; Bailout Deco SAC (L/min) covers the rest of the ascent, the travel between stops included. The window starts at 10 minutes: a diver who has just handled a loop failure is still working when they reach that first stop. Only the steps after the bail point consume carried gas.
Read the bailout figures on the loop plan as a stock check rather than a sum. Each cylinder carried purely for bailout is charged the whole dive replayed at bailout rates, one cylinder at a time, so the figures answer “would this cylinder alone get me out” and are not meant to be added together. A Diluent + Bailout cylinder the loop is flown on is not among them: on the loop plan it is budgeted as the diluent it is, and these scenarios are where it is judged as bailout.
Select a scenario and a cylinder that was your diluent before the bail point is charged both jobs - the loop gas already spent, plus the ascent - because by then the first is genuinely gone.
Next
Reading a bailout plan works through the scenarios of one dive, row by row.