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specifcations concerning the characteristics of aerodromes so
as to provide a series of aerodrome facilities that are suitable
for the aeroplanes that are intended to operate at the aerodrome.
The code is not intended to be used for determining
runway length or pavement strength requirements. The code is
composed of two elements which are related to the aeroplane
pe$ormance characteristics and dimensions. Element I is a
number based on the aeroplane reference field length and
element 2 is a letter based on the aeroplane wing span and
outer main gear wheel span. A particular specification i~
related to the more appropriate of the two elements of the code
or to an appropriate combination of the two code elements. The
code letter or number within an element selected for design
purposes is related to the critical aeroplane characteristics for
which the facility is provided. men applying Annex 14,
Volume I, the aeroplanes which the aerodrome is intended to
serve are first identified and then the two elements of the code.
1.6.1 An aerodrome reference code - code number and
letter - which is selected for aerodrome planning purposes
shall be determined in accordance with the characteristics of
the aeroplane for which an aerodrome facility is intended.
1.6.2 The aerodrome reference code numbers and letters
shall have the meanings assigned to them in Table 1-1.
- 1.6.3 The code number for element 1 shall be determined
from Table 1-1, column 1, selecting the code number
corresponding to the highest value of the aeroplane reference
field lengths of the aeroplanes for which the runway is
intended.
Note.- The determination of the aeroplane refeence field
length is solely for the selection of a code number and is not
intended to influence the actual runway length provided.
1.6.4 The code letter for element 2 shall be determined
from Table 1-1, column 3, by selecting the code letter which
corresponds to the greatest wing span, or the greatest outex
main gear wheel span, whichever gives the more demanding
code letter of the aeroplanes for which the facility is
intended.
Note.- Guidance to assist the appropriate authority in
determining the aerodrome reference code is given in the
Aerodrome Design Manual, Parts 1 and 2.
IS0 Standard
19104, Geographic information - Terminology
19108, Geographic information - Temporal schema
Annex 14 -Aerodromes Volume I
Table 1 - 1. Aerodrome reference code
(see 1.6.2 to 1.6.4)
Code element 1 Code element 2
Code Aeroplane reference Code Outer main gear
number field length letter Wing span wheel span'
(1) (2) (3) (4) (5)
1 Less than 800 m A
2 800 m up to but not B
including 1 200 m
3 1 200 m up to but not C
including 1 800 m
4 1 800 m and over D
E
F
a. Distance between the outside edges of the main gear wheels.
Up to but not
including 15 m
15 m up to but not
including 24 m
24 m up to but not
including 36 m
36 m up to but not
including 52 m
52 m up to but not
including 65 m
65 m up to but not
including 80 m
Up to but not
including 4.5 m
4.5 m up to but not
including 6 m
6 m up to but not
including 9 m
9 m up to but not
including 14 m
9 m up to but not
including 14 m
14 m up to but not
including 16 m
Note.- Guidance on planning for aeroplanes with wing spans greater than 80 m is given in the Aerodrome Design Manual,
Parts I and 2.
CHAPTER 2. AERODROME DATA
2.1 Aeronautical data
2.1.1 Determination and reporting of aerodrome related
aeronautical data shall be in accordance with the accuracy and
integrity requirements set forth in Tables 1 to 5 contained in
Appendix 5 while taking into account the established quality
system procedures. Accuracy requirements for aeronautical
data are based upon a 95 per cent confidence level and in that
respect, three types of positional data shall be identified:
surveyed points (e.g. runway threshold), calculated points
(mathematical calculations from the known surveyed points of
points in $ace, fixes) and declared points (e.g. flight
information region boundary points).
Note.- Specifications governing the quality system are
given in Annex 15, Chapter 3.
2.1.2 Contracting States shall ensure that integrity of
aeronautical data is maintained throughout the data process
from surveytorigin to the next intended user. Aeronautical data
integrity requirements shall be based upon the potential risk
resulting from the corruption of data and upon the use to
which the data item is put. Consequently, the following
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