CSS Software

Aircraft

Weather radar and navigation

Review weather radar controls, SimBrief route loading, AIRAC updates, and flying without GPS using radio and IRS updating.

Updated Latest published version

The Aircraft Features PDF describes SimBrief company routes, AIRAC cycle updates, functional terrain/weather radar controls, and classic navigation behavior when GPS updating is not available.

Load company routes

Use the SimBrief company route workflow described in the Aircraft Features PDF when building routes around the CSS 737 FMC.

Update navigation data

The PDF includes an AIRAC update section. Keep AIRAC and route data aligned before relying on route import and procedure selection.

Fly without GPS updating

The aircraft remains RNAV1 capable through DME/DME/IRS behavior. The manual describes FMC position handling, takeoff update behavior, and scratchpad messages that indicate navigation-update limits.

AIRAC cycle update workflow

AIRAC cycle update workflow.

DMEDMEIRS updating when GPS is unavailable

DME/DME/IRS updating when GPS is unavailable.

Manual IRSFMC position update checks

Manual IRS/FMC position update checks.

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Clickspots and lighting

Use Aircraft Features sections for hidden cockpit clickspots, cockpit/cabin lighting, animations, and immersive features.

Cockpit setup

Set the required MSFS cockpit interaction mode, review keybind mappings, and prepare route/navdata workflow before flying the CSS 737 Classic.

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Source: CSS Launcher User Manual, Rev. 5 — December 2025.