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1) a plan showing contours at 1 m (3 ft) intervals in
the area 60 m (200 ft) on either side of the extended
centre line of the runway, to the same distance as the
profile, the contours to be related to the runway
threshold;
2) an indication where the terrain or any object thereon,
within the plan defined in 1) above, differs by +3 m
(10 ft) in height from the centre line profile and is likely
to affect a radio altimeter:
3) a profile of the terrain to a distance of 900 m (3 000 ft)
from the threshold along the extended centre line of the
runway.
6.5.2 Recvmmendativn.- Where zhe terrain ut a
distance greater than 900 m (3 000 3) from the runway
threshold is mountainous or otherwise sign$cant to users of
the chart, the profile of the terrain should be shown to a
distance not exceeding 2 000 m (6 500 ft) from the runway
threshold.
6.5.3 Recommendation.- The ILS reference datum
height should be shown to the nearest halfmetre or foot.
ANNEX 4
CHAPTER 7. ENKOUTB CHAW - ICAO
7.1 Function 7.4.2 Parallels and meridians shall be shown at suitable
intervals.
This chart shall provide flight crews with information to
facilitate navigation along ATS routes in compliance with air 7.4.3 Graduation marks shall be placed at consistent
traffic services procedures. intervals along selected parallels and meridians.
Note.- Simplified versions of these charts are appropriate
for inclusion in Aeronautical Information Publications to
complement the tabulation of radio communication and
navigation facilities.
7.5 Identification
Each sheet shall be identified by chart series and number.
7.2 Availability
7.2.1 The Enroute Chart - ICAO shall be made available 7.6 Culture and topography
in the manner prescribed in 1.3.2 for all areas where flight
information regions have been established. 7.6.1 Generalized shore lines of all open water areas,
large lakes and rivers shall be shown except where they
Note.- under an Area - ICAO conflict with data more applicable to the function of the chart.
may have to be provided. (See Chapter 8.)
7.6.2 Within each quadrilateral formed by the parallels
7.2.2 Where different air traffic services routes, position and meridians the area minimum altitude shall be shown,
reporting requirements or lateral limits of flight information except as provided for in 7.6.3.
re-gi ons or control areas exist in different layers of airspace and
cannot be shown with sufficient clarity on one chart, separate 7.6.3 Recommendation.- In areas of high latitude
charts shall be provided. where it is determined by the appropriate authority that True
7.3 Coverage and scale
North orientation of the chart is impractical, the area
minimum altitude should be shown within each quadrilateral
formed by reference lines of the graticule (grid) used.
Note 1.- A uniform scale for charts of this type cannot be 7.6.4 Where charts are not True North orientated, this
specijied due to the varying degree of congestion of
information in certain areas.
fact and the selected orientation used shall be clearly indicated.
Note 2.- A linear scale based on the mean scale of the
chart may be shown.
7.7 Magnetic variation
7.3.1 Recommendation.- Layout of sheet lines should
be determined by the density and pattern of the ATS route Recommendation.- Isogonals should be indicated and
structure. the date of the isogonic information given.
7.3.2 Large variations of scale between adjacent charts
showing a continuous route structure shall be avoided.
7.8 Bearings, tracks and radials
7.3.3 An adequate overlap of charts shall be provided to
ensure continuity of navigation. 7.8.1 Bearings, tracks and radials shall be magnetic,
except as provided for in 7.8.2.
7.4 Projection 7.8.2 Recommendation.- In areas of high latitude
where it is determined by the appropriate authority
7.4.1 Recommendation.- A conformal projection on that reference to Magnetic North is impractical, another
which a straight line approximates a great circle should be suitable reference, i.e. True North or Grid North, should
used. be used.
ANNEX 4 7-1
Annex 4 - Aeronautical Charts Chapter 7
7.8.3 Where bearings, tracks or radials are given with
reference to True North or Grid North, this shall be clearly
indicated. When Grid North is used its reference grid meridian
shall be identified.
7.9 Aeronautical data
7.9.1 Aerodromes
All aerodromes used by international civil aviation to which an
instrument approach can be made shall be shown.
Note.- Other aerodromes may be shown.
7.9.2 Prohibited, restricted and danger areas
Prohibited, restricted and danger areas relevant to the layer of
　
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