13.5.1 A wind direction indicator should be located
on the unit which, in so far as is practicable, indicates the actual
wind conditions over the helideck. Units on which night helicopter
operations take place should have provisions to illuminate the wind
direction indicator.
13.5.2 The helideck should be marked as follows:
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.1 the perimeter with a continuous white line
with a width of 0.3 m:
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.2 the unit's name should be provided on the helideck
and be positioned on the obstacle side with characters not less than
1.2 m in height and in a colour contrasting with the background:
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.3 an aiming circle, concentric to the helideck,
painted yellow with an inside diameter equal to 0.5 LD. The width
of the line should be 1 m;
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.4 a white "H" centered on the landing area with
the horizontal on the bisector of the obstacle-free sector. The "H"
should be 3 m high, 1.8 m wide with 0.4 m wide lines; and
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.5 the helideck obstacle-free sector marking should
indicate the origin of the obstacle-free sector, the direction of
the limits o f the sector and the design dimensions (the LD or RD
value) of the helideck, as shown in figure 13-5.
Figure 13-5 Obstacle-free sector marking
13.5.3
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.1 The helideck should be fitted with omnidirectional
yellow lights in order to enable the landing area to be easily identified
at night. These lights should be uniformly positioned along the perimeter
of the helideck and not more than 3 m apart. The administration may
allow the substitution of red lights for yellow lights to indicate
the position of cranes, and in the case of self-elevating units, legs.
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.2 Helideck floodlights, where fitted, should
be located so as to avoid glare to pilots. The arrangements and aiming
of floodlights should be such that helideck markings are illuminated
and that shadows are kept to a minimum.