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FlightGear is using a simple property-based messaging system which can render GUI messages using propoerty listenenrs and the PUI GUI system.

This system is primarily used for the following features:

  • Tutorials
  • Failure management (limits.nas)
  • Copilot announcements
  • ATC
Cquote1.png none of those are hard-coded, those are all going through the property tree and gui.nas, so you can "disable" things there. The higher-level features are limits.nas (or the failure manager) and the tutorial system.
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