High-quality color/digital photos taken on a predominantly cloud-free day should be representative of the current state of the airfield/site, and observing locations should develop map-type visibility charts to augment these photographic visibility markers. What are these photos and charts called?

• A. Representative visibility markers.
• B. Observing locations.
• C. Aircraft Mishap.
• D. Supplementary Data for an Inactive or Parallel Runway.

Answer: (A)

Representative visibility markers are standardized color photos and map-style charts that document the airfield’s current visibility state. By taking high-quality images on a mostly cloud-free day, the photos reflect typical conditions at the site, and the accompanying observing locations are used to create consistent visibility charts that augment these photographic markers. This combination provides a repeatable reference for assessing and comparing visibility over time.

The other terms don’t fit the concept. Observing locations are the spots where observations are made, not the photos or charts themselves. Aircraft Mishap is unrelated to documenting visibility. Supplementary Data for an Inactive or Parallel Runway refers to data about a runway condition, not the representative visibility imagery and charts.