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While flying over an unfamiliar area, you observe red and green stars being launched from the ground every 10 seconds. What is the meaning of this signal?

  • A

    You are close to a military aerodrome traffic zone.

  • B

    You are about to enter a low level firing range.

  • C

    There is a gas venting area in the vicinity.

  • D

    You are in or very near to a restricted, prohibited or danger area.

ICAO Annex 2 - Appendix 1

3. VISUAL SIGNALS USED TO WARN AN UNAUTHORIZED AIRCRAFT FLYING IN, OR ABOUT TO ENTER A RESTRICTED, PROHIBITED OR DANGER AREA

By day and by night, a series of projectiles discharged from the ground at intervals of 10 seconds, each showing, on bursting, red and green lights or stars will indicate to an unauthorized aircraft that it is flying in or about to enter a restricted, prohibited or danger area, and that the aircraft is to take such remedial action as may be necessary.

Restricted area. An airspace of defined dimensions, above the land areas or territorial waters of a State, within which the flight of aircraft is restricted in accordance with certain specified conditions.

Prohibited area. An airspace of defined dimensions, above the land areas or territorial waters of a State, within which the flight of aircraft is prohibited.

Danger area. An airspace of defined dimensions within which activities dangerous to the flight of aircraft may exist at specified times.

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