// Set position and heading given an airport id and heading (degrees)
bool fgSetPosFromAirportIDandHdg( const string& id, double tgt_hdg );
+//find altitude given glideslope and offset distance or offset distance
+//given glideslope and altitude
+void fgSetPosFromGlideSlope(void);
+
// Initialize various time dependent systems (lighting, sun position, etc.)
// returns a new instance of the SGTime class
SGTime *fgInitTime();