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purpose of national implementation and for other effects
provided for in the Convention, either through direct use or
through translation into its own national language, and to
notify the Organization accordingly.
Editorial practices
The following practice has been adhered to in order to indicate
at a glance the status of each statement: Standards have been
printed in light face roman; Recommended Practices have
been printed in light face italics, the status being indicated by
the prefix Recommendation; Notes have been printed in light
face italics, the status being indicated by the prefix Note.
It is to be noted that in the English text the following
practice has been adhered to when writing the specifications:
Standards employ the operative verb “shall”, while
Recommended Practices employ the operative verb “should”.
Foreword Annex 11 — Air Traffic Services
(ix) 12/71/111/0/013
No. 42
The units of measurement used in this document are in
accordance with the International System of Units (SI) as
specified in Annex 5 to the Convention on International Civil
Aviation. Where Annex 5 permits the use of non-SI
alternative units these are shown in parentheses following the
basic units. Where two sets of units are quoted it must not be
assumed that the pairs of values are equal and interchangeable.
It may, however, be inferred that an equivalent
level of safety is achieved when either set of units is used
exclusively.
Any reference to a portion of this document which is
identified by a number includes all subdivisions of that
portion.
Table A. Amendments to Annex 11
Amendment(s) Source(s) Subject(s)
Adopted/approved
Effective
Applicable
1st Edition Rules of the Air and
Air Traffic Control (RAC)
Division, Third Session
(1948)
International Standards and Recommended Practices — Air Traffic
Services.
18 May 1950
1 October 1950
1 June 1951
1 to 6
(2nd Edition)
Rules of the Air and
Air Traffic Control (RAC)
Division, Fourth
Session (1950)
Aerodrome traffic; transfer of control; contents of clearance; distress
phase; requirements for communications; upper flight information regions
and upper control areas; vertical separation.
27 November 1951
1 April 1952
1 September 1952
7 Air Navigation
Commission
Deletion of guidance material on the dissemination of information on ATS
facilities.
22 February 1956
—
—
8
(3rd Edition)
Second Air Navigation
Conference (1955)
Definitions; establishment of authority; designations of airspace;
separation of aircraft; requirements for communications; requirements for
meteorological information; determination and establishment of
controlled airspaces; diagrams of communications.
11 May 1956
15 September 1956
1 December 1956
9
(4th Edition)
Rules of the Air, Air Traffic
Services and Search and
Rescue (RAC/SAR)
Divisions (1958)
Definitions; objectives of air traffic services; designations of airspace and
controlled aerodromes; specifications for airspace; air traffic control
service; alerting service; requirements for communications; determination
and establishment of controlled airspaces, naming of reporting points;
automation of air traffic control.
8 December 1959
1 May 1960
1 August 1960
10 Panel for Coordinating
Procedures Respecting the
Supply of Information for
Air Operations (1959)
SIGMET information; delegation and application of flight information
service; requirements for meteorological information.
2 December 1960
1 April 1961
1 July 1961
11 Air Navigation
Commission
Deletion of guidance material illustrating the depiction on charts of air
traffic services information.
26 June 1961
—
—
12 Air Navigation
Commission
Guidance material relating to the selection of designators for routes within
controlled airspace.
15 December 1961
—
—
13 Air Navigation
Commission
Notification of rescue coordination centres during uncertainty, alert and
distress phases.
13 April 1962
1 August 1962
1 November 1962
14 Air Navigation
Commission
Requirements for other aircraft in the vicinity of an aircraft in a state of
emergency to be informed of the nature of emergency.
19 June 1964
1 November 1964
1 February 1965
Annex 11 — Air Traffic Services Foreword
12/71/111//0013 (x)
　
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