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taxiway centre line or edge lights or taxiway centre line markers 5.5.6.5 A taxiway centre line marker shall be retroare
not provided. reflective green.
Annex 14 -Aerodromes Volume I
5.5.6.6 Recommendation.- The marked surface as
viewed by the pilot should be a rectangle and should have a
minimum viewing area of 20 cm2.
5.5.6.7 Taxiway centre line markers shall be so designed
and fitted as to withstand being run over by the wheels of an
aircraft without damage either to the aircraft or to the markers
themselves.
5.5.7 Unpaved taxiway edge markers
Applicatibn
5.5.7.1 Recommendation.- Where the extent of an
unpaved taxiway is not clearly indicated by its appearance
compared with .that of the surrounding ground, markers
should be provided.
Location
5.5.7.2 Recommendation.- Where taxiway lights are
provided, the markers should be incorporated in the light
furtures. Where there are no lights, markers of conical shape
should be placed so as to delimit the taxiway clearly.
5.5.8 Boundary markers
Application
5.5.8.1 Boundary markers shall be provided at an aerodrorne
where the landing area has no runway.
Location
5.5.8.2 Boundary markers shall be spaced along .the
boundary of the landing area at intervals of not more than 200 m,
if the type shown in Figure 5-32 is used, or approximately 90 m,
if the conical type is used with a marker at any m e r .
Characteristics
5.5.8.3 Recommendation.- Boundary markers should
be of a form similar to that shown in Figure 5-32, or in the
form of a cone not less than 50 cm high and not less than
75 cm in diameter at the base. The markers should be
coloured to contrast with the background against which they
will be seen. A single colour, orange or red, or two contrasting
colours, orange and white or alternatively red and white,
should be used, except where such colours merge with the,
background.
Figure 5-32. Boundary markers
CHAPTJ?,R 6. VISUAL AIDS FOR DENOTING OBSTACLES
Not&- The manking &or Iighhg of obstncles is
i~endedt o d ~ d W~ enik to by idicding the
presetwe 01 the &stacks. I1 does not necsarily mhcl
opeding limitations which may be imposed by an obstacle.
6.1. I RewmmendPtlaa, A fired obrtacle tht extends
above a &on climb sum within 3 000 rn of the inner
edge of the tohflclimb suijhce should be mmkd and, if the
mway is used at night, lighted, except lkal:
a) such maw rusd lighting may k omitted when the
obstacle is shielded by mother fixed obstacle;
a) such marking and lighting may k omitted wben rhe
able is shielded by anothtr fwd obstncle;
b) the marking m y be omitted when the obstacle is lighted
by mediumintensity obstacle ligbt& A. by day a d
its height a hthe level of the surrounding ground
does not exceed 150 m;
c) the mmding m y be omitted wben the obstacle is lighted
by high-intensity obshcie lights by day; and
d) the lighting my be omiued wbert the obstacle is a
lighthouse and an aeronautical d y in dicates the
lighthouse light to be ficient.
6.1.4 Recommendation,- A @d ob-cle above a
h~rizomls urfirce s h d d be marked mi if the a e d mis
m i a t n igh~.-lig~teexxic ept that:
b) the mamg may be mWlllnewd hen the &sack is lighted
by medium-itrtensi~o bstacle Iigk, Type A, by day d a) suck marking mmd lighting m yb e omitted when:
its height above the level of the surroun&hg ground
does not md I s 0 ?n; I ] the obswle is shielded by mherfied obstaEk; or
c) the makhg be omitted * A the obstacle is lighted
by kigh-intansiq obstacle lights by dw; and
d) t k lighting may k mitted where the ohwk is a
l i g R t b w a d an aenmautical study Ltdicam the
Zighuse light to be sufiient.
6.1.2 R btioa.- A fired &jetC orhe* h an
obstacle. adjuce~t to a take* climb sugke should be
manked and, if the runway is used at night, lighted if such
rnanking and lighting is considered necessary to ensure its
avoidmce, mxep! that the marRing may be omitted whenn
a) the object is lighted by medium-inrensiq obstacle tights,
13fpe A, by day and its height ahme the lewl of the
sumtinding gmnd does not exceed 150 iom; or
h) the nhject if lighied hy high-inkmi0 obsW1c l i g h by
day
2) for a circuit exhively obstructed by immabk
objects or termin, procedures have been established
to ensure safe vettical cleamnce below prescribed
flight paths; or
3) rn a e n m ~ i c dstu dy shows the obstmcle not to be of
opemtiml sign fiance;
b) fh~d ~may bge om't ted wha rhe obstacle is l i g k d
by durn-intetasity obstacle fights, A, by &y and
its height dove the Ievel of the m d i n g gmnd
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