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71:. The system consists of a pair of synchronized flashing lights located laterally on each side of the runway threshold. REILs may be either omnidirectional or unidirectional facing the approach area. They are effective for:
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Runway threshold identification lights shall be located symmetrically about the runway centre line, in line with the threshold and approximately 10 meters outside each line of runway edge lights.
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at the threshold of a non-precision approach runway when additional threshold conspicuity is necessary or where it is not practicable to provide other approach lighting aids; and
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where a runway threshold is permanently displaced from the runway extremity or temporarily displaced from the normal position and additional threshold conspicuity is necessary.
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FAA Aeronautical
Information Manual, Chapter 2 (Aeronautical Lighting and Other Airport Visual Aids), Section 1 (Airport Lighting Aids)
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Runway threshold identification lights should be flashing white lights with a flash frequency between 60 and 120 per minute.
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63:) (ICAO identifies these as Runway Threshold Identification Lights) are installed at many
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to provide rapid and positive identification of the approach end of a particular
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The lights shall be visible only in the direction of approach to the runway.
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Identification of a runway surrounded by a preponderance of other lighting
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Identification of a runway which lacks contrast with surrounding terrain
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Runway threshold identification lights should be installed:
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Identification of a runway during reduced visibility
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87:International Civil Aviation Organization
176:(3 ed.). July 1999. Archived from
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52:as seen from an approaching aircraft
199:FAA Aeronautical Information Manual
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171:"Aerodrome Design and Operations"
129:"Order JO 7340.1Z: Contractions"
136:Federal Aviation Administration
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57:Runway end identifier lights
31:Runway end identifier lights
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89:(ICAO) recommends that:
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157:2009-09-04 at the
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138:. March 15, 2007.
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155:Archived
65:airports
69:runway
181:(PDF)
174:(PDF)
132:(PDF)
85:The
61:REIL
18:REIL
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