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

# Descent

> Prepare landing configuration, performance inputs, minimums and navigation radios for the arrival.

## Descent

Verify landing pressurization, recall system annunciations, enter VREF, set the applicable minimums, set or verify navigation radios and select autobrake as needed. Obtain all numerical targets from the assigned arrival data and performance calculation.

Selected pressurization landing altitude is distinct from current cabin altitude. Verify the correct selected target. Confirm the chosen approach family and its required configuration before entry.

**1. Pressurization: Landing altitude — Verify**

Verify the pressurization landing-altitude setting against the mission’s destination requirement.

**2. System annunciator — Recall**

Recall system annunciations and interpret the actual indications before proceeding.

**3. Approach REF page: VREF — Enter**

Enter or confirm the landing reference speed (VREF) on APPROACH REF for the selected landing configuration and weight. Follow the [FMC entry and verification steps](https://www.narev.ai/docs/irl-gym/aircraft/manual/fmc-operation.md), then read back the accepted selection.

**4. Radio/baro minimums — As needed**

Read the applicable minimums from the selected approach chart. Determine whether they use a radio or barometric reference, then set and verify the value and reference mode.

**5. Navigation radio — Set/verify**

Tune and verify the navigation radios for the selected arrival and approach. Use the installed conventional navigation receiver or multi-mode receiver (MMR), with the frequencies and courses from the selected approach chart.

**6. Autobrake — As needed**

Select the autobrake setting required by the landing performance and mission instructions. Verify the selector and required indications.

Continue with [Approach](https://www.narev.ai/docs/irl-gym/aircraft/procedures/approach.md) when its conditions apply.

## Detailed procedures

The following pages preserve each checklist item’s conditions, verification requirements and source identity.

* [Descent: conditions and verification](https://www.narev.ai/docs/irl-gym/aircraft/procedures/descent.md)


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