Main Marking Fin Flash
The main marking is displayed in 4 positions (ie above and below each wing, and
on each side of the fuselage) on aircraft. The fin flash is displayed on the
rudder. Most aircraft have the serial number applied on the fin and above and
below each wing with the prefix SAN. Most
helicopters have the serial number applied on the fuselage with the prefix SAN. The service title
"Servicio Aérea Nacional" is displayed on the fuselage sides of aircraft.