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aircraft; required navigation performance; automatic dependent
surveillance; provisions relating to the World Geodetic System - 1984
(WGS-84) geodetic datum; transmission of information to aircraft on
radioactive material and toxic chemical "clouds".
Pressure-altitude reporting transponders; microwave landing system;
en-route obstacle clearance criteria.
Aeronautical databases; AIRMET information; wind shear.
Definitions: automatic dewndent surveillance systems and procedures;
data interchange between'automated ATS systems; ATS applications for
air--g round data links; separation between aircraft; RNP and RNAV for enroute
operations; requirements for the uplink of OPMET information to
aircraft in flight; volcanic ash advisories; Human Factors.
ATS airspace classifications; visual meteorological conditions; and
minimum safe altitude warning.
Definitions; ATS safety management; ADS to indicate state of aircraft
emergency; flexible use of airspace; minimum flight altitudes; terrain
clearance during radar vectoring; downstream clearance delivery service;
transfer of responsibility for control; read-back of clearances; air traffic
flow management; automatic terminal information service; VOLMET and
D-VOLMET: equipment in ATS units and criteria for indicators(s) for
RVR values; editorial amendments.
18 March 1994
25 July 1994
10 November 1994
8 March 1996
15 July 1996
7 November 1996
20 March 1997
21 July 1997
6 November 1997
19 March 1998
20 July 1998
5 November 1998
10 March 1999
19 July 1999
4 November 1999
12 March 2001
16 July 2001
1 November 200 1
2811 1/02
No. 41
Foreword Annex 11 - Air Traffic Services
Adopted/approved
Effecrive
Applicable
41 Tenth meeting of the Spacing between parallel area navigation (RNAV) routes; and notification 2 1 February 2002
Review of the General of dangerous goods information to rescue coordination centres (RCCs) 15 July 2002
Concept of Separation 28 November 2002
Panel (RGCSPI 10);
Seventeenth meeting of the
Dangerous Goods Panel
(DGPI 17)
28/11/02
No. 41
Chapter 2 Annex 11 - Air Traffic Services
2.26 ATS safety management
2.26.1 States shall implement systematic and appropriate
ATS safety management programmes to ensure that safety is
maintained in the provision of ATS within airspaces and at
aerodromes.
2.26.2 As of 27 November 2003, the acceptable level of
safety and safety objectives applicable to the provision of ATS
within airspaces and at aerodromes shall be established by the
State or States concerned. When applicable, safety levels and
safety objectives shall be established on the basis of regional
air navigation agreements.
Note.- The acceptable level of safety may be specijied in
qualitative or quantitative terms. The following are examples
of measures which could be used to express the acceptable
level of safety:
a) a maximum probability of an undesirable event, such as
collision, loss of separation or runway incursion;
b) a maximum number of accidents perflight hour;
C) a maximum number of incidents per aircraji movement;
d) a maximum number of valid short-tenn conflict alerts
(STCA) per aircraji movement.
2.26.3 Recommendation.- The acceptable level of
safety and safety objectives applicable to the provision of ATS
within airspaces and at aerodromes should be established by
the State or States concerned. When applicable, safety levels
and safety objectives should be established on the basis of
regional air navigation agreements.
2.26.4 An ATS safety management programme shall,
inter alia:
a) identify actual and potential hazards and determine the
need for remedial action;
b) ensure that remedial action necessary to maintain an
acceptable level of safety is implemented; and
c) provide for continuous monitoring and regular assessment
of the safety level achieved.
2.26.5 Any significant safety-related change to the ATC
system, including the implementation of a reduced separation
minimum or a new procedure, shall only be effected after a
safety assessment has demonstrated that an acceptable level of
safety will be met and users have been consulted. When
appropriate, the responsible authority shall ensure that adequate
provision is made for post-implementation monitoring to
verify that the defined level of safety continues to be met.
Note 1.- When, due to the nature of the change, the
acceptable level of safety cannot be expressed in quantitative
terms, the safety assessment may rely on operational judgement.
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