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.
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 that 60 m dive, with the five failures from its one gas change sitting among the rest of the plan’s warnings.
Dive Warnings
Watch for
- 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.