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What do these symbols mean in an airport?

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  • $\begingroup$ Welcome to the site. Can you please provide context, like where did you see it? A clearer title will help others looking for the same answer. $\endgroup$
    – ymb1
    Jan 25 '20 at 23:58
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The answer is stated in ICAO Annex 12 (Search and Rescue)PDF. (See Appendix I relevant to Chapter 5, 5.8 of the Annex.)

Ground-air visual signal code for use by survivors:

G/A used by survivors

Ground-air visual signal code for use by rescue units:

G/A used by rescue units

Note 1.— Symbols may be formed by any means such as: strips of fabric, parachute material, pieces of wood, stones or such like material; marking the surface by tramping, or staining with oil.

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  • $\begingroup$ Thank you for the answer. $\endgroup$
    – montblank
    Jan 26 '20 at 4:34
  • $\begingroup$ Very interesting. In "Use of Weapons", Iain M Banks adapts this kind of signalling. Zakalwe marks his location for airborne pickup on a battlefield by making a Z - by arranging bodies... $\endgroup$
    – SebTHU
    Oct 1 at 12:28

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