air traffic clearance

In 1946, Heathrow came into use as the principal London Airport, and for several years flights at Hanworth were subject to Heathrow air traffic clearance, eventually growing to delays of several hours; no fixed-wing flights are recorded after 1955.

On that remarkably historical night, the air traffic clearance "Clear to land" was issued from the Sibu Air Traffic Control Tower on the assigned frequency 122.6 MHZ to the first Boeing 737-500 to land on the asphalt surface of the designated Runway 13.