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of relevant material for promulgation. To ensure timely
provision of the information to the aeronautical information
service, close co-ordination between those services concerned
is therefore required.
2.6.3 Of a particular importance are changes to
aeronautical information that affect charts and/or computerbased
navigation systems which qualify to be notified by the
aeronautical information regulation and control (AIRAC)
system, as specified in Annex 15, Chapter 6 and Appendix 4.
The predetermined, internationally agreed AIRAC effective
dates in addition to 14 days postage time shall be observed by
the responsible heliport services when submitting the raw
informatioddata to aeronautical information services.
2.6.4 The heliport services responsible for the provision
of raw aeronautical informatioddata to the aeronautical
information services shall do that while taking into account
accuracy and integrity requirements for aeronautical data as
specified in Appendix 1 to this Annex.
Note 1.- Specifications for the issue of a NOTAM
and SNOWTAM are contained in Annex 15, Chapter 5, and
Appendices 6 and 2, respectively.
Note 2.- The AIRAC information is distributed by the AIS
at least 42 days in advance of the AIRAC effective dates with
the objective of reaching recipients at least 28 days in advance
of the effective date.
Note 3.- The schedule of the predetermined internationally
agreed AIRAC common effective dates at intervals
of 28 days, including 6 November 1997, and guidance for the
AIRAC use are contained in the Aeronautical Information
Services Manual (Doc 8126, Chapter 2, 2.6).
2511 1104
No. 3
Chapter 5 Annex 14 -Aerodromes
5.3.2.4 The light from the beacon shall show at all angles
of azimuth.
5.3.2.5 Recommendation.- The effective light intensity
distribution of each flash should be as shown in Figure 5-9,
Illustration I.
Note.- Where brilliancy control is desired, settings of
10 per cent and 3 per cent have been found to be satisfactory.
In addition, shielding may be necessary to ensure that pilots
are not dazzled during the final stages of the approach and
landing.
5.3.3 Approach lighting system
Application
5.3.3.1 Recommendation.- An approach lighting
system should be provided at a heliport where it is desirable
and practicable to indicate a preferred approach direction.
Location
5.3.3.6 Recommendation.- The light distribution of
steady lights should be as indicated in Figure 5-9, Illustration
2 except that the intensity should be increased by a
factor of 3 for a non-precision final approach and take-off
area.
5.3.3.7 Sequenced flashing lights shall be omnidirectional
white lights.
5.3.3.8 Recommendation.- The flashing lights should
have a flash frequency of one per second and their light
distribution should be as shown in Figure 5-9, Illustration 3.
The flash sequence should commence from the outermost light
and progress towards the crossbar.
5.3.3.9 Recommendation.- A suitable brilliancy
control should be incorporated to allow for adjustment of light
intensity to meet the prevailing conditions.
Note.- The following intensity settings have been found
suitable:
a) steady lights - 100 per cent, 30 per cent and 10 per cent;
and
b) flashing lights - 100per cent, 10 per cent and 3 per cent.
5.3.3.2 The approach lighting system shall be located in a
straight line along the preferred direction of approach.
5.3.4 Visual alignment guidance system
Characteristics
5.3.3.3 Recommendation.- An approach lighting
system should consist of a row of three lights spaced uniformly
at 30 m intervals and of a crossbar 18 m in length at a
distance of 90 m from the perimeter of thejinal approach and
take-off area as shown in Figure 5-10. The lights forming the
crossbar should be as nearly as practicable in a horizontal
straight line at right angles to, and bisected by, the line of the
centre line lights and spaced at 4.5 m intervals. Where there
is the need to make the jinal approach course more
conspicuous additional lights spaced uniformly at 30 m
intervals should be added beyond the crossbar. The lights
beyond the crossbar may be steady or sequenced flashing,
depending upon the environment.
Note.- Sequenced flashing lights may be useful where
identification of the approach lighting system is dificult due to
surrounding lights.
5.3.3.4 Recommendation.- Where an approach
lighting system is provided for a non-precision jiml approach
and take-off area, the system should not be less than 210 m in
length.
5.3.3.5 The steady lights shall be omnidirectional white
　
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