Longitude of the station tuned in on the NAV1 radio. Returns 0 if the NAV1 radio is not tuned to a station. Measured in degrees, from -180 to +180. West longitude is positive unless an East_Longitude command has reversed the orientation. Read-only.
Example
WEST_LONGITUDE
IF PLANE_LON < VOR_1_LON THEN
PRINT "You are east of the VOR."
ENDIF