§ 26. Mr. N. Macpherson
asked the Parliamentary Secretary to the Ministry of Civil Aviation what is the average time taken to land an aircraft by instrument landing system compared with the average time taken to land an aircraft by ground control approach.
§ Mr. Beswick
The time to land does not depend solely on the aid used, but the average time interval between successive approaches of aircraft using I.L.S. is 8½ minutes and G.C.A. 4½ minutes. The interval between I.L.S. aircraft will be reduced with the introduction of radar marshalling procedures which are now under development.