The checks set in the ICD Safety section run at every open-circuit switch on the ascent, and at the switch from the loop to open circuit at a bailout point. A plan carrying no helium has nothing for them to measure and raises none of them.
Nor does a plan shallower than the section’s Minimum Dive Depth, which starts at 80 m: none of its switches is examined. If a switch you expected to be flagged is not, that floor is the first thing to check - it reads the depth of the dive, so a 45 m plan raises nothing however severe the switch.
The schedule is still computed
Every violation is reported at Error severity, and one is raised per failed check, so a single severe switch can produce several. None of them stops the plan: the planner does not refuse the dive, blank the profile or drop the stops. You get the schedule and the failures together, and the judgement stays yours.
Below is a 60 m dive, with the five failures from its one gas change sitting among the rest of the plan’s warnings.
Dive Warnings
What the checks cover
- The checks steer the planner’s own gas choices. It will not pick an ascent gas whose switch fails an enabled check, so a violation almost always comes from a switch depth you set by hand.
- A bailout switch is checked too, and reports itself with the prefix
ICD: bailout switch. Those scenarios are marked and still planned. See Bailout scenarios.
Next
On a rebreather plan, CCR settings is the section that follows. On an open-circuit plan the Plan step is finished: the Review step is where the planner answers.