13.5.23 Fixed obstacles and permanent equipment,
such as crane booms or the legs of self-elevating units, which may
present a hazard to helicopters, should be readily visible from the
air during daylight. If a paint scheme is necessary to enhance identification
by day, alternate black and white, black and yellow, or red and white
bands are recommended, not less than 0.5 m nor more than 6 m wide.
13.5.24 Omnidirectional red lights of at least
10 cd intensity should be fitted at suitable locations to provide
the helicopter pilot with visual information on objects which may
present a hazard to helicopters and on the proximity and height of
objects which are higher than the landing area and which are close
to it or to the limited obstacle sector boundary. Such lighting should
comply with the following:
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.1 Objects which are more than 15 m higher than
the landing area should be fitted with intermediate red lights of
the same intensity spaced at 10 m intervals down to the level of the
landing area (except where such lights would be obscured by other
objects).
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.2 Structures such as flare booms and towers may
be illuminated by floodlights as an alternative to fitting the intermediate
red lights, provided that such lights should be arranged such that
they will illuminate the whole of the structure and not interfere
with the helicopter pilot’s night vision.
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.3 On self-elevating units the leg(s) nearest
the helideck may be illuminated by floodlights as an alternative to
fitting the intermediate red lights, provided that such lights should
be arranged such that they will not interfere with the helicopter
pilot’s night vision.
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.4 Alternative equivalent technologies to highlight
dominant obstacles in the vicinity of the helideck may be utilized
in accordance with the recommendations of the ICAO.
13.5.25 An omnidirectional red light of intensity
25 to 200 cd should be fitted to the highest point of the unit and,
in the case of self-elevating units, as near as practicable to the
highest point of each leg. Where this is not practicable (e.g., flare
towers) the light should be fitted as near to the extremity as possible.