---
title: "CCR settings"
description: "The rebreather-only section of the Plan step: setpoint settings, bailout SAC rates and scrubber duration, and where each one is covered in full."
---

> Documentation Index
> Fetch the complete documentation index at: https://docs.divelogic.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# CCR settings

import { SetpointCard } from "@/components/react/PlannerSettingsScreens";

The **CCR Settings** section appears only on a plan created in rebreather mode,
between Environment and ICD Safety, under the subtitle *Setpoints for each
phase, and bailout planning rates*. It holds three cards; the
[rebreather pages](/ccr/setup) cover all three in depth. An open-circuit plan
does not have this section at all: go on to
[the Review step](/planning/reviewing).

## Setpoint Settings

The first card sets the oxygen partial pressure the loop is held at, phase by
phase. Each field is in bar and accepts 0.2 to 1.6.

- **Descent Setpoint (bar)**: active from the surface, on the way down. The
  planner starts at 0.7 bar.
- **Working Setpoint (bar)**: active on the bottom. The planner starts at
  1.3 bar.
- **Decompression Setpoint (bar)**: active from the first mandatory stop to the
  surface. The planner starts at 1.3 bar.
- **Custom Depth Setpoints**: any number of overrides, each a **Depth (m)** and
  a **Setpoint (bar)**, added with **Add Custom Setpoint**. An override
  activates when the diver reaches or passes that depth and stays active for
  the rest of the dive unless a deeper one replaces it.

The setpoint fixes the inert fraction of what you are breathing at every depth,
which makes it the largest single lever on a closed-circuit schedule. Read
[Setpoints](/ccr/setpoints) before choosing one.

## Bailout SAC Rates

The second card holds the two consumption rates the open-circuit ascent is
estimated at: **Working SAC (L/min)**, starting at 45, and **Bailout SAC
(L/min)**, starting at 25. Both accept 5 to 60 L/min. They are covered with the
loop's own rates on [Breathing rates](/planning/breathing-rates), and the
scenarios they feed are on [Bailout scenarios](/ccr/bailout).

## Scrubber

The third card takes one field, **Scrubber Duration** in minutes: the rated
life of the CO₂ absorbent you are diving. Left empty, nothing is tracked.
Filled in, the planner compares it against the dive's runtime: a warning as the
dive runs into the final 60 minutes of scrubber life, another at the final 30,
and an error when the runtime exceeds the rating outright. None of the three
change the schedule. See [Scrubber tracking](/ccr/scrubber).

## Next

[Setting up a CCR plan](/ccr/setup) covers the breathing mode itself and the
gases a closed-circuit plan will not run without; the pages after it take each
of these three cards in turn.

Source: https://docs.divelogic.ai/planning/ccr-settings/index.mdx