What do these symbols mean in an airport?
1 Answer
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:
Ground-air visual signal code for use 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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$\begingroup$ 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... $\endgroup$– SebTHUOct 1, 2021 at 12:28