> For the complete documentation index, see [llms.txt](https://docs.flightsim-studio.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flightsim-studio.com/e-jet-series/mcdu-guide/nav.md).

# NAV

> For the complete documentation index, see [llms.txt](https://docs.flightsim-studio.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flightsim-studio.com/e-jet-series/mcdu-guide/nav.md).

## NAV

Press **NAV** for **NAV INDEX 1/2**. **NEXT** opens index **2/2**.

### NAV INDEX 1/2

| LSK | Label     | Function                                                   |
| --- | --------- | ---------------------------------------------------------- |
| 1L  | DATALINK  | DATALINK index                                             |
| 2L  | WPT LIST  | Pilot waypoint list (create custom WPT is not implemented) |
| 5L  | PATTERNS  | HOLD / FLYOVER advisories                                  |
| 5R  | HOLD      | Select hold, or place `*HOLD*` on the scratchpad           |
| 6L  | DEPARTURE | Same departure select as RTE                               |
| 6R  | ARRIVAL   | Same arrival select as RTE                                 |

{% hint style="info" %}
**ATC**, **FIX INFO**, **FPL LIST**, **SEC FPL MENU**, **CROSS PTS**, and **FLT SUM** are not implemented.
{% endhint %}

### NAV INDEX 2/2

| LSK | Label       | Function                                         |
| --- | ----------- | ------------------------------------------------ |
| 1L  | POS SENSORS | FMS / IRS / GPS / VOR-DME status                 |
| 1R  | POS INIT    | Position initialization                          |
| 2L  | NAV IDENT   | Database ident (also the first-flight gate page) |
| 3L  | DATA LOAD   | Load CUSTOM DB / NAV DB                          |
| 3R  | MAINTENANCE | FMS maintenance and setup                        |

{% hint style="info" %}
**CONVERSION** and **CLOSEST APT** are not implemented.
{% endhint %}

### Holds and patterns

**PATTERNS** → **HOLD** puts `*HOLD*` in the scratchpad. **FLYOVER** puts `*FLYOVER*`. Apply the advisory on a left LSK of F-PLN.

**HOLDING PATTERN** — fix, speed, inbound course / turn direction, leg time or distance, EFC, then **INSERT/APPLY**. Activate the MOD plan.

See Holdings.

### Position and sensors

**POS INIT** — last / reference / GPS load and UPDATE.

**POS SENSORS** — FMS position versus IRS 1/2, GPS 1/2, VOR/DME. Drill into **GPS STATUS** and **IRS STATUS**.

### DATA LOAD

Load **CUSTOM DB**, **NAV DB**, or both from the aircraft navdata files. Confirm, then watch the progress page.

Updating Navigraph cycles is done from the EFB (or the desktop updater). See Navdata Updater.

### Maintenance / setup

**FMS MAINTENANCE** → **SETUP** → **FLT CONFIG** (bank factor, FPL auto page, origin/destination display, SBAS, **TEMP COMP CONFIG**).

**FMS Mode** pages include **Failed Sensors** and **Return To Service** (display/navigation only — no sensor-fail or RTS checklist simulation). **HDG Mode** toggles magnetic / true heading and saves the config.

Temperature compensation modes (OFF / COLD / HOT\&COLD) and applying compensated altitudes: FMS Temp Compensation.