Apron Markings Signs Handbook [cracked]

The Third Edition (2017) of the Apron Markings and Signs Handbook

5.3 Direction / Destination Signs (Yellow Background / Black Text)

• Appearance: Red paint with white hash marks or "DANGER" text.
• The Rule: Absolutely no vehicles, and no pedestrians. If your aircraft’s nose is over that line, you risk sandblasting the ground crew behind you.

• Use: Jet blast hazard zones, fire equipment access lanes, and prohibited parking.
• Rule: Red means stop or extreme caution. Red markings often denote the "Intolerance Zone" (where an engine intake could suck in a person or vehicle).
• Example: Red hash marks behind an aircraft indicate the APU (Auxiliary Power Unit) exhaust hazard.