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The position of each selected elevation shall be indicated by 17.8.2 The date of the isogonic information shall be
a dot. indicated in the margin.
17.7.9.2 The elevation (in metres or feet) of the highest
point on the chart and its geographical position to the nearest
five minutes shall be indicated in the margin.
17.9 Aeronautical data
17.7.9.3 Recommendation.- The spot elevation of the
highest point on any sheet should be cleared of hypsometric 17.9.1 Aeronautical information shall be shown continting.
sistent with the use of the chart and the revision cycle.
Annex 4 - Aeronautical Charts Chapter 17
17.9.2 Aerodromes
17.9.2.1 Land and water aerodromes and heliports shall
be shown with their names, to the extent that they do not
produce undesirable congestion on the chart, priority being
given to those of greatest aeronautical significance.
17.9.2.2 The aerodrome elevation, the lighting available,
the type of runway surface and the length of the longest
runway or channel, shown in abbreviated form for
each aerodrome in conformity with the example given in
Appendix 2, provided they do not cause undesirable clutter on
the chart, shall be indicated.
17.9.2.3 Abandoned aerodromes which are still recognizable
as aerodromes from the air shall be shown and
identified as abandoned.
17.9.3 obstacles
17.9.3.1 Obstacles shall be shown.
Note.- Objects of a height of 100 m (300fi) or more above
ground are normally regarded as obstacles.
17.9.3.2 When considered of importance to visual flight,
prominent transmission lines and permanent cable car
installations, which are obstacles, shall be shown.
17.9.4 Prohibited, restricted and danger areas
Prohibited, restricted and danger areas shall be shown.
17.9.5 Air trafic services system
17.9.5.1 Significant elements of the air traffic services
system including, where practicable, control zones, aerodrome
traffic zones, control areas, flight information regions and
other airspaces in which VFR flights operate shall be shown
together with the appropriate class of airspace.
17.9.5.2 Where appropriate, the air defence identification
zone (ADIZ) shall be shown and properly identified.
Note.- ADZ2 procedures may be described in the chart
legend.
17.9.6 Radio navigation aids
Radio navigation aids shall be shown by the appropriate
symbol and named, but excluding their frequencies, coded
designators, times of operation and other characteristics unless
any or all of this information which is shown is kept up to date
by means of new editions of the chart.
17.9.7 Supplementary information
17.9.7.1 Aeronautical ground lights together with
their characteristics or their identifications or both shall be
shown.
17.9.7.2 Marine lights on outer prominent coastal or
isolated features of not less than 28 km (15 NM) visibility
range shall be shown:
1) where they are not less distinguishable than more
powerfil marine lights in the vicinity;
2) where they are readily distinguishable from other marine
or other types of lights in the vicinity of built-up coastal
areas;
3) where they are the only lights of significance available.
2511 1/04.
No. 53
Chapter 18 Annex 4 - Aeronautical Charts
18.6.9.2 The elevation (in metres or feet) of the highest 18.7 Magnetic variation
point on the chart and its geographical position to the nearest
five minutes shall be indicated in the margin. 18.7.1 Isogonic lines shall be shown.
18.6.9.3 Recommendation.- The spot elevation of the 18.7.2 The date of isogonic information shall be indicated
highest point in any sheet should be cleared of hypsometric in the margin.
tinting.
18.6.1 0 Incomplete or unreliable relief 18.8 Aeronautical data
18.6.10.1 Areas that have not been surveyed for contour
information shall be labelled "Relief data incomplete". 18.8.1 Aerodromes
18.6.10.2 Charts on which spot elevations are generally Land and water aerodromes and heliports shall be shown with
unreliable shall bear a warning note prominently displayed on their names, to the extent that thcy do not produce undesirable
the face of the chart in the colour used for aeronautical congestion on the chart, priority being given to those of
information, as follows: greatest aeronautical significance.
"Warning - 'The reliability of relief information on this
chart is doubtful and elevations should be used with 18.8.2 Obstacles
caution."
Obstacles shall be shown.
'1 8.6.1 1 Escarpments
Recommendation.- Esca~mentssh ould be shown when
they are prominent landmarks or when cultural detail is very
sparse.
18.8.3 Prohibited, restricted and
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