Signs complement surface markings by providing directional information and mandatory instructions in low-visibility conditions.
: Dedicated to aircraft maneuvering. This includes taxiway/taxilane centerlines and aircraft stand markings. Apron Markings Signs Handbook
: The most recent comprehensive update, approximately 78 pages long, available on platforms like Second Edition (2007) approximately 78 pages long
Black lettering on a yellow background. These provide location data, such as gate numbers or terminal directions. Apron Markings Signs Handbook