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- night Width of inner edge plus 30% of distance to
inner gate out to a minimum width of 10 rotor
diameters.
Elevation of inner and outer Determined by the distance from the inner
gates edge and the designated gradient($).
Slopes As given in Tables 4-1 and 4-3.
Divergence As given in Tables 4- 1 and 43.
Total length of area As given in Tables 4-1 and 4-3.
* This is the minimum distance required prior to initiating a turn after take-off or completing
a turn in the final phase.
Note.- More than one turn may be necessary in the total length of the take-off
climb/approach area. The same criteria will apply ,for each subsequent turn except that the
widths of the inner and outer gates will normally be the maximum width of the area.
CHAPTER 5. VISUAL AIDS
5.1 Indicators 5.1.1.6 Recommendation.- The colour of the wind
direction indicator should be so selected as to make it clearly
visible and understandable from a height of at least 200 m
5.1.1 Wind direction indicators (650 j?) above the heliport, having regard to background.
Where practicable, a single colour, preferably white or
orange, should be used. Where a combination of two colours
Application is required to give adequate conspicuity against changing
backgrounds, they should preferably be orange and white, red
5.1.1 .I A heliport shall be equipped with at least one and white, or black and white, and should be arranged in five
wind direction indicator. alternate bands the first and last band being the darker colour.
Location
5.1.1.2 A wind direction indicator shall be located so as
to indicate the wind conditions over the final approach and
take-off area and in such a way as to be free from the effects
5.1.1.7 A wind direction indicator at a heliport intended
for use at night shall be illuminated.
5.2 Markings and markers
of airflow disturbances caused by nearby objects or rotor Note.- See Annex 14, Volume 1, 5.2.1.4, Note 1,
downwash. It shall be visible from a helicopter in flight, in a concerning improving conspicuity of markings.
hover or on the movement area.
5.1.1.3 Recommendation- Where a touchdown and
119-off area may be subject to a disturbed air flow, then 5.2.1 winching area marking
additional wind direction indicators located close to the area
should be provided to indicate the sugace wind on the area.
Application
Note.-- Guidance on the location of wind direction
in,dicators is given in the Heliport Manual. 5.2.1.1 Recommendation.- A winching area marking
should be provided at a winching area.
Characteristics
Location
5.1.1.4 A wind direction indicator shall be constructed so 5.2.1.2 A winching area marking shall be located so that
that it gives a clear indication of the direction of the wind and its centre coincides with the centre of the clear zone of the
a general indication of the wind speed. winching area.
5.1.1.5 Recommendation.- An indicator should be a
truncated cone made of 1ightweight.fabric and should have the Characteristics
following minimum dimensions:
5.2.1.3 A winching area marking shall consist of a solid
circle of not less than 5 m in diameter and painted yellow.
Surface level Elevatcd heliports
heliports and helidecks
Diameter
(larger end)
Diameter
(smaller end)
2.4 m 1.2 m 5.2.2 Heliport identification marking
0.6 m 0.3 m
Application
5.2.2.1 A heliport identification marking shall be
provided at a heliport.
30 ANNEX 14 - VOLUME 11
Chapter 5 Annex 14 - Aerodromes
Figure 5-1. Heliport identification marking (shown with
hospital cross and orientation with obstacle-free sector)
5.2.2.2 A heliport identification marking shall be located
within the final approach and take-off area, at or near the
centre of the area or when used in conjunction with runway
designation markings at each end of the area.
Characteristics
5.2.2.3 A heliport identification marking, except for a
heliport at a hospital, shall consist of a letter H, white in
colour. The dimensions of the marking shall be no less than
those shown in Figure 5-1 and where the marking is used in
conjunction with the final approach and take-off area
designation marking specified in 5.2.5 its dimensions shall be
increased by a factor of 3.
Note.- On a helideck covered with a rope netting, it may
be advantageous to increase the height of the marking to 4 m
and the other dimensions proportionally.
5.2.2.4 A heliport identification marking for a heliport at
a hospital shall consist of a letter H, red in colour, on a white
cross made of squares adjacent to each of the sides of a square
containing the H as shown in Figure 5-1.
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