-// Set position and heading given an airport id and heading (degrees)
-bool fgSetPosFromAirportIDandHdg( const string& id, double tgt_hdg );
+
+// Initialize various time dependent systems (lighting, sun position, etc.)
+// returns a new instance of the SGTime class
+SGTime *fgInitTime();
+
+// set up a time offset (aka warp) if one is specified
+void fgInitTimeOffset();