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should be used, except where such rolours merge with the
lmckgmund.
Note.- Against smte backgrounds it may be found necessa
v to use a diferent colour fnwn omnge or red to obtain
.ruficient mntrrrsl.
6.2.6 Recommendation.- When mobile objects are
marked by colmr, a single conspicuous colour, pn$~rubIy red
or yellowish green far emergency vehicles and yellt~w for
service vehicles should be u ~ d .
Table 6-1. Marking band widths
approach the object. The shape of markers shall be distinctive
to the extent necessary to ensure that they are not mistaken for
markers employed to convey other information. and they shall
be such that the hazard presented by the object they mark is
not increased.
6.2.8 Recommendation- A marker displu-wd on an
overhead wire, cable. etc.. shrwld be spherical and haw a
diameter of not Iess than 60 cm.
6.2.9 Recommendlbn.- The spucinlp between nw
mnsecutive markers or between a marker and a suppmmng
twer should be appropriate to the diameter oftlte marker. but
in no cuse should the spring exceed:
a) 30 m where the tltarker diameter is 60 on progressi~rlv
increasing with the diameter of the nrarker to
6) 35 m where the nwrker diameter i.r 80 ~ N aIrr d jhrflrer
progressively increasing to a maximum of
C) 40 m where the marker diameter is (gut least I30 cm.
Where multiple wires. cubles, err. are in~dved, a nlovker
should be located nor lower than the level of'the hi~hesrw ire
at the pint marked.
6.2.10 RecommendPtio~- A marker should be of one
colour. When installed. white und red, nr ~vhite nnd orattge
markers should be displayed alternately. The colour selected
shnuld contrast with tire background aguinst which it will be
seen.
use of flags
Greater No1
than exceding Band width
1.5 m 210 m In of longest dimension
210 m 270 m In" " "
270 m 330 m 1/11 " " "
330 m 3W m 1/13 " " "
390 m 450 m 1/15 " "
450 m 510 m 1/17 " " "
510 m 570 m 1/19 " " "
570 m 630 m 1 * " "
Use of markem
6.2.1 1 Flags used to mark objects shall be displiiyed
around. on top of. or around the highest edge of, the object.
When flags are used to mark extensive objects or groups of
closely spaced objects. they shall be displayed at least every
IS m. Hags shall not increase the hazard presented by the
object they mark
6.2.12 Rags used to mark fixed objects shall not be less
than 0.6 m square and flags used to mark mobile objects, not
less than 0.9 m square.
6.21 3 Reanmendation.- Flags used to mark JiwPd
objects s h l d be omge in colorrr or a combination of MQ
triangular sections, one orunge and the ofher m-hire, or one red
and the orher white, excep that where such rolours merge with
the backgrmrnd otiter conspicuous colours should be used.
6.2.7 Markers displayed on or adjacent to objects shall be 6.2.14 Flags used to mark mobile objects shall consist of
located in conspicuous positions sn as to retain the general a chequered pattern. each square having sides of not less than
definition of the object and shall be recognizable in clear 0.3 m. The mloun of the pattern shall contrast each with the
weather from a distance of at least 1 000 m for an object to be other and with the background against which they will be seen.
viewed from the air and 300 m for an object to be viewed from Orange and white or alternatively red and white shall be used,
the ground in all directions in which an aircraft is likely to except where such colours merge with the backpund.
H
Note, H is less the 45 m tbr the exmnples shorn 8b0Ve.
For greater heights intemediata lights must be added 8s shown below.
A Roof top pattern
A' Plain roof pattern
B Curved surface
C Skeleton structure
Liht spacing (X) in accordance with Appendix 6
Number of levels of lights = N = Y (metres)
X (melres)
Figure 62. Examples of marking and lighting of tall structures
6 4
Chapter 6 Annex 14 -Aerodromes
6.3 Lighting of objects
Use of obstacle lights
6.3.1 The presence of objects which must be lighted, as
specified in 6.1, shall be indicated by low-, medium- or
high-intensity obstacle lights, or a combination of such lights.
Note.- High-intensity obstacle lights are intended for day
use as well as night use. Care is needed to ensure that these
lights do not create disconcerting dazzle. Guidance on the
design, location and operation of high-intensity obstacle lights
is given in the Aerodrome Design Manual, Part 4.
6.3.2 Recommendation.- Low-intensity obstacle lights,
Type A or B, should be used where the object is a less
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