Closed or nonoperational runway markings shall be X's with arms __ ft wide by __ ft in length.

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Multiple Choice

Closed or nonoperational runway markings shall be X's with arms __ ft wide by __ ft in length.

Closed or nonoperational runway markings use a large X painted on the pavement to signal that the runway is not in use. The size of those X markings is standardized to be clearly visible from aircraft and ground vehicles, ensuring quick and unmistakable recognition. The standard specifies arms that are 10 feet wide and 60 feet long for each diagonal stroke. This creates a prominent, well-proportioned X that stands out across a variety of runway widths and lighting conditions, making the closure obvious from a distance and at high speeds on the surface. The other options would produce markings that are either too small to be reliably seen or not aligned with the established proportions used for closed-runway indicators.

Closed or nonoperational runway markings use a large X painted on the pavement to signal that the runway is not in use. The size of those X markings is standardized to be clearly visible from aircraft and ground vehicles, ensuring quick and unmistakable recognition.

The standard specifies arms that are 10 feet wide and 60 feet long for each diagonal stroke. This creates a prominent, well-proportioned X that stands out across a variety of runway widths and lighting conditions, making the closure obvious from a distance and at high speeds on the surface. The other options would produce markings that are either too small to be reliably seen or not aligned with the established proportions used for closed-runway indicators.

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