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Refer to figure.
When barricades are used to indicate closure of a taxiway or other airport areas, what is the location of the flags and what is the interval between each flag?

  • A

    Around the entire barricade.

  • B

    Placed on top of the barricade at 10-meter intervals.

  • C

    Placed on top of the barricade at 20-meter intervals.

  • D

    Placed on top of the barricade at specified intervals based on the length of the barricade, typically at 10 to 20-meter intervals.

ICAO Annex 14
7.4 Unserviceable areas

Application

7.4.1 Unserviceability markers shall be displayed wherever any portion of a taxiway, apron or holding bay is unfit for the movement of aircraft but it is still possible for aircraft to bypass the area safely.

Characteristics of unserviceability markers

7.4.3 Unserviceability markers shall consist of conspicuous upstanding devices such as flags, cones or marker boards.

6.2.3 Fixed objects

Marking by flags

6.2.3.5 Flags used to mark fixed objects shall be displayed around, on top of, or around the highest edge of, the object. When flags are used to mark extensive objects or groups of closely spaced objects, they shall be displayed at least every 15 m. Flags shall not increase the hazard presented by the object they mark.

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