Which of the following markings are associated with a non-precision instrument runway?

The markings associated with a non-precision instrument runway include threshold, designation, centerline, and aiming point. Each of these markings serves a specific purpose to assist pilots during the approach and landing phases of flight.

The threshold marking indicates the beginning of the runway that is available for landing and is critical for pilots to identify where the landing should occur. The designation marking, often seen at the end of runways, aids in identifying the runway's number, enhancing situational awareness. The centerline marking provides a visual reference to help pilots align with the runway during approach, while the aiming point marks a spot on the runway that pilots aim for, assisting in ensuring that they land at the appropriate location.

In contrast, the other choices include markings that, while important for runway operations, do not constitute a complete set associated specifically with non-precision instrument runways. For instance, side stripes and touchdown zone markings are more characteristic of precision instrument runways or serve different operational purposes. Understanding the specific markings associated with various types of runways helps enhance flight safety and pilots' situational awareness during instrument approaches.