Which marking is NOT typically found on a precision runway?

• A. Touchdown zone markings
• B. Threshold markings
• C. Shoulder markings
• D. Displaced threshold markings

Answer: (C)

Precision runways, designed for aircraft landing and taking off with a high level of accuracy, are characterized by specific markings that aid pilots in understanding the runway's layout and safety features. Among the typical markings, touchdown zone markings indicate the point on the runway where the aircraft should ideally touch down, threshold markings denote the beginning of the usable runway, and displaced threshold markings indicate portions of the runway that are not available for takeoff or landing but may assist in providing adequate clearance or visibility.

Shoulder markings, on the other hand, are not part of the precision runway marking system. The shoulder of a runway refers to the area adjacent to the runway itself, and markings specifically indicating the shoulder are not present on precision runways. Instead, precision runway markings are focused on providing critical information directly related to landing and takeoff operations, which all contribute to the effectiveness of runway safety and operations but do not extend to shoulder designations. Thus, selecting shoulder markings as the option that is not typically found on a precision runway is correct, as they are outside the category of essential runway markings.