Which marking helps identify a displaced threshold?

The marking that helps identify a displaced threshold is a solid white line. This solid white line indicates that the beginning of the runway is not available for landing operations, which is crucial for maintaining safety and operational integrity at an airport. Displaced thresholds, often due to obstacles, allow for the runway to be usable in some areas while clearly communicating to pilots that they should not land before the indicating line.

A solid red line typically indicates other types of restrictions or prohibitions on runways, while dotted yellow lines signify taxiway edges. A solid yellow line is primarily used to designate areas where taxiing is permitted but does not have the same definition as a displaced threshold. Understanding these markings is vital for pilots to ensure safe operations and adherence to air traffic regulations.