ICAO Doc 9432 Manual of Radiotelephony (4th ed. 2007)

11-4 Manual of Radiotelephony

11.6 ACAS MANOEUVRES

11.6.1 When a pilot reports a manoeuvre induced by an ACAS resolution advisory (RA), the controller
shall not attempt to modify the aircraft flight path until the pilot reports returning to the terms of the current ATC
clearance or instruction, but the controller shall provide traffic information as appropriate.

11.6.2 Once an aircraft departs from its clearance in compliance with an RA, the controller ceases to be
responsible for providing separation between that aircraft and any other aircraft affected as a direct
consequence of the manoeuvre induced by the RA. The controller resumes responsibility for providing
separation for all the affected aircraft when the controller acknowledges a report from the flight crew that the
aircraft has resumed the current clearance or the controller acknowledges a report from the flight crew that the
aircraft is resuming the current clearance and issues an alternative clearance which is acknowledged by the
flight crew.

FASTAIR 345 TCAS RA

FASTAIR 345 ROGER REPORT
RETURNING TO CLEARANCE

FASTAIR 345 CLEAR OF CONFLICT RETURNING TO
CLEARANCE, NOW MAINTAINING FL 350

ALEXANDER CONTROL ROGER

–––––––––

FASTAIR 345 CLIMB TO FL 350

FASTAIR 345 UNABLE, TCAS RA

FASTAIR 345 ALEXANDER CONTROL ROGER REPORT
MAINTAINING FL 310

FASTAIR 345 CLEAR OF CONFLICT FL 310 RESUMED
ALEXANDER CONTROL ROGER

–––––––––

— END —

ICAO TECHNICAL PUBLICATIONS

The following summary gives the status, and also maturity for adoption as International Standards and
describes in general terms the contents of the various Recommended Practices, as well as material of a more
series of technical publications issued by the permanent character which is considered too detailed for
International Civil Aviation Organization. It does not incorporation in an Annex, or is susceptible to frequent
include specialized publications that do not fall amendment, for which the processes of the Convention
specifically within one of the series, such as the would be too cumbersome.
Aeronautical Chart Catalogue or the Meteorological
Tables for International Air Navigation. Regional Supplementary Procedures (SUPPS)
have a status similar to that of PANS in that they are
International Standards and Recommended approved by the Council, but only for application in the
Practices are adopted by the Council in accordance with respective regions. They are prepared in consolidated
Articles 54, 37 and 90 of the Convention on form, since certain of the procedures apply to
International Civil Aviation and are designated, for overlapping regions or are common to two or more
convenience, as Annexes to the Convention. The regions.
uniform application by Contracting States of the
specifications contained in the International Standards is The following publications are prepared by authority
recognized as necessary for the safety or regularity of of the Secretary General in accordance with the
international air navigation while the uniform principles and policies approved by the Council.
application of the specifications in the Recommended
Practices is regarded as desirable in the interest of Technical Manuals provide guidance and
safety, regularity or efficiency of international air information in amplification of the International
navigation. Knowledge of any differences between the Standards, Recommended Practices and PANS, the
national regulations or practices of a State and those implementation of which they are designed to facilitate.
established by an International Standard is essential to
the safety or regularity of international air navigation. In Air Navigation Plans detail requirements for
the event of non-compliance with an International facilities and services for international air navigation in
Standard, a State has, in fact, an obligation, under the respective ICAO Air Navigation Regions. They are
Article 38 of the Convention, to notify the Council of prepared on the authority of the Secretary General on
any differences. Knowledge of differences from the basis of recommendations of regional air navigation
Recommended Practices may also be important for the meetings and of the Council action thereon. The plans
safety of air navigation and, although the Convention are amended periodically to reflect changes in
does not impose any obligation with regard thereto, the requirements and in the status of implementation of the
Council has invited Contracting States to notify such recommended facilities and services.
differences in addition to those relating to International
Standards. ICAO Circulars make available specialized
information of interest to Contracting States. This
Procedures for Air Navigation Services (PANS) includes studies on technical subjects.
are approved by the Council for worldwide application.
They contain, for the most part, operating procedures
regarded as not yet having attained a sufficient degree of

© ICAO 2007
10/07, E/P1/1360

Order No. 9432
Printed in ICAO