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Refer to figure.
The visual ground signal of the figure means...

  • A

    glider flying is in progress.

  • B

    landing prohibited for a longer period.

  • C

    after take-off and before landing all turns have to be made to the right.

  • D

    aircraft are required to land, take off and taxi on runways and taxiways only.

Refer to figure.
ICAO Annex 14 - Aerodromes
ATTACHMENT A

17. Signal area

A signal area need be provided only when it is intended to use visual ground signals to communicate with aircraft in flight. Such signals may be needed when the aerodrome does not have an aerodrome control tower or an aerodrome flight information service unit, or when the aerodrome is used by aeroplanes not equipped with radio. Visual ground signals may also be useful in the case of failure of two-way radio communication with aircraft. It should be recognized, however, that the type of information which may be conveyed by visual ground signals should normally be available in AIPs or NOTAM. The potential need for visual ground signals should therefore be evaluated before deciding to provide a signal area.


ICAO Annex 2 - Rules of the air
4.2 Visual ground signals

4.2.8 Glider flights in operation

A double white cross displayed horizontally (Figure A1-11) in the signal area indicates that the aerodrome is being used by gliders and that glider flights are being performed.

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