+void fgReInitSubsystems();
+
+
+// find basic airport location info from airport database
+bool fgFindAirportID( const string& id, FGAirport *a );
+
+// Set the initial position based on presets (or defaults)
+bool fgInitPosition();
+
+// Initialize various time dependent systems (lighting, sun position, etc.)
+// returns a new instance of the SGTime class
+SGTime *fgInitTime();