GM1 to AMC2 ATS.TR.235(b) ATC clearances

CONTENTS OF STANDARD CLEARANCES FOR DEPARTING AIRCRAFT — COMMUNICATION FAILURE

(a)Clearances for departing aircraft may specify a cleared level other than that indicated in the filed flight plan for the en-route phase of flight, without a time or geographical limit for the cleared level. Such clearances will normally be used to facilitate the application of tactical control methods by air traffic control units, normally through the use of an ATS surveillance system.

(b)Where clearances for departing aircraft which contain no time or geographical limit for a cleared level are utilised, the action to be taken by an aircraft experiencing air-ground communication failure in the event that the aircraft has been radar-vectored away from the route specified in its current flight plan, should be prescribed on the basis of a regional air navigation agreement and included in the SID description or published in AIPs.