Scrubber tracking compares the dive’s runtime against a rated CO₂ scrubber duration you supply, and raises warnings as the runtime approaches it. It is advisory: the schedule is never altered. A plan with tracking on and the same plan with it off produce the same stops, the same runtime and the same time to surface.
Entering a duration
The field is Scrubber Duration, in minutes, on the Scrubber card in Plan → CCR. It accepts whole minutes from 1 upwards.
Scrubber
Rated CO₂ scrubber duration. The plan warns when the dive runs into the final 60 and 30 minutes of scrubber life, and errors when the runtime exceeds it. Leave empty to disable tracking.
Leave it empty and tracking is off. A value that is not a positive number is
also treated as off, and the planner says so:
Scrubber duration 0 min is not positive; scrubber tracking disabled.
The three thresholds
| Condition | Severity | What you see |
|---|---|---|
| Runtime enters the final 60 minutes of scrubber life | Warning | Scrubber within 60 min of its 180 min rated duration |
| Runtime enters the final 30 minutes | Warning | Scrubber within 30 min of its 180 min rated duration |
| Runtime exceeds the rated duration | Error | Scrubber rated duration 180 min exceeded by 12 min at surfacing |
Each warning carries the minute of the dive at which it triggers, so they land on the timeline rather than at the end. The overtime error is raised against surfacing, because that is where the total is known. All three appear in the Dive Warnings modal alongside the rest, listed in Warnings.
What it does not do
The rated duration is treated as a fixed budget of minutes. Nothing else about the dive enters the comparison: not water temperature, not depth, not work rate, not how long the scrubber has already been used, not CO₂ readings from the unit.
Next
- The Review step is where a finished plan is read, and the next step of the walkthrough.
- Warnings shows where these three land and how severity is used across the planner.