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5.2.13.2 Air transit route markers shall be located along
5.2.12.3 An air taxiway marker shall be frangible and the centre line of the air transit route and shall be spaced at
when installed shall not exceed 35 cm above ground or snow intervals of not more than 60 m on straight sections and 15 m
level. The surface of the marker as viewed by the pilot shall on curves.
r - - - - - - - - - - - - - - - - - - - - -7
I Obstacle sector I
I
r - - - - - - -
I
I
I
I
I
I Touchdown and lift-off
I
I ' area marking Obstacle-free sector origin II
I
I
210° sector origin
Touchdown and lift-off
area marking
A
03 Z +- D value kl8 60 cm JoCm
Figure 5-5. Helideck obstacle-free sector marking
36
Chapter 5 Annex 14 - Aerodromes
approx.
m
C7
/ / / / / / / / / / I / / / / // //////// / / / I /
t
Figure 5-6. Air taxiway marker
Figure 5-7. Air transit route marker
37
J1-m "F_L - - \t E
T-
7 1 ///////////// /////,I////?
Example B
r
T
Jim
LI mI I _lT' E
7
/ / / / / / / / / / / / / / / //////f
Example A
Annex 14 - Aerodromes Volume II
Characteristics
5.2.13.3 An air transit route marker shall be frangible and
when installed shall not exceed I m above ground or snow
level. The surface of the marker as viewed by the pilot shall
be a rectangle with a height to width ratio of approximately
1 to 3 and shall have a minimum area of 1 500 cm2 as shown
in the examples in Figure 5-7.
5.2.13.4 An air transit route marker shall be divided into
three equal, vertical bands coloured yellow, green and yellow,
respectively. If the air transit route is to be used by night, the
marker shall be internally illuminated or retro-reflective.
5.3 Lights
5.3.1 General
Note I.- See Annex 14, Volume 1, 5.3.1 concerning
speciJications on screening of non-aeronautical ground lights.
and design of elevated and inset lights.
Note 2.- In the case of helidecks and heliporzs locofed
near navigable waters, consideration needs to be given to
ensuring that aeronautical ground lights do not cause
confusion to mariners.
Note 3.- As helicopters will generally come very close to
extraneous light sources, it is particularly important to ensure
that, unless such lights are navigation lights exhibited in
accordance with international regulations. they are screened
or located so as to avoid direct and reflected glare.
Note 4.- The following spec$cations have been developed
for systems intended for use in conjunction with a non,-
instrument or non-precision final approach and take-off area.
5.3.2 Heliport beacon
Application
5.3.2.1 Recommendation.- A heliport beacon should
be provided at a heliport where:
a) long-range visual guidance is considered necessary and
is not provided by other visual means; or
b) identification of the heliport is dEfSicult due to
surrounding lights.
Location
5.3.2.2 The heliport beacon shall be located on or
adjacent to the heliport preferably at an elevated position and
so that it does not dazzle a pilot at short range.
Note.- Where n heliport beacon is likely to dazzle pilots at
short range it may be switched off during the final stages oj'
the approach and landing.
Characteristics
5.3.2.3 The heliport beacon shall emit repeated series of
equispaced short duration white flashes in the format in
Figure 5-8.
Intensity Flash duration
0.5 - 2.0
1 milliseconds 0.8 s 0.8 s - 1.2s -
Figure 5-8. Heliport beacon flash characteristics
38
Chapter 5 Annex 14 - Aerodromes
5.3.2.4 The light from the beacon shall show at all angles
of azimuth.
5.3.2.5 Recommendation.- The effective light intensity
distribution of each flash should be as shown in Figure 5-9,
Illustration 1.
Note.- Where brilliancy control is desired, settings of
10 per cent and 3 per cent have been found to be sati.$actory.
In addition, shielding may be necessary to ensure that pilots
are not dazzled during the final stages of the approach and
landing.
5.3.3 Approach lighting system
Application
5.3.3.1 Recommendation.- An approach lighting
system should be provided at a heliport where it is desirable
and practicable to indicate a preferred approach direction.
Location
5.3.3.6 Recommendation.- The light distribution of
steady lights should be as indicated in Figure 5-9, Illustration
2 except that the intenslo should be increased by a
jkctor of 3 for a non-precision jnal approach and take-off
area.
　
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