// The data found is written into the passed-in ATCData structure.
bool FindByFreq( double lon, double lat, double elev, double freq, ATCData* ad, atc_type tp = INVALID );
- // query the database by location, lon and lat are
- // in degrees, elev is in meters, range is in nautical miles.
- // Returns the number of stations of the specified type that are in range, and pushes them into stations
+ // query the database by location, lon and lat are in degrees, elev is in meters, range is in nautical miles.
+ // Returns the number of stations of the specified atc_type tp that are in range of the position defined by
+ // lon, lat and elev, and pushes them into stations.
// If no atc_type is specifed, returns the number of all stations in range, and pushes them into stations
// ** stations is erased before use **
int FindByPos( double lon, double lat, double elev, double range, comm_list_type* stations, atc_type tp = INVALID );
+ // Returns the distance in meters to the closest station of a given type,
+ // with the details written into ATCData& ad. If no type is specifed simply
+ // returns the distance to the closest station of any type.
+ // Returns -9999 if no stations found within max_range in nautical miles (default 100 miles).
+ // Note that the search algorithm starts at 10 miles and multiplies by 10 thereafter, so if
+ // say 300 miles is specifed 10, then 100, then 1000 will be searched, breaking at first result
+ // and giving up after 1000.
+ // !!!Be warned that searching anything over 100 miles will pause the sim unacceptably!!!
+ // (The ability to search longer ranges should be used during init only).
+ double FindClosest( double lon, double lat, double elev, ATCData& ad, atc_type tp = INVALID, double max_range = 100.0 );
+
// Find by Airport code.
bool FindByCode( string ICAO, ATCData& ad, atc_type tp = INVALID );