What color marks ILS markings on airfields?

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Multiple Choice

What color marks ILS markings on airfields?

Explanation:
The color used for ILS-related ground markings is yellow. On taxiways, all markings—including the ILS hold position lines that mark the boundary of the instrument landing system’s protected area—are painted yellow to match other taxiway markings. Runways, by contrast, use white markings, so the ILS markings stand out as yellow to pilots and ground crews. The ILS hold line itself is two solid yellow lines paired with two dashed yellow lines across the taxiway, indicating where aircraft must stop when ILS signals are active.

The color used for ILS-related ground markings is yellow. On taxiways, all markings—including the ILS hold position lines that mark the boundary of the instrument landing system’s protected area—are painted yellow to match other taxiway markings. Runways, by contrast, use white markings, so the ILS markings stand out as yellow to pilots and ground crews. The ILS hold line itself is two solid yellow lines paired with two dashed yellow lines across the taxiway, indicating where aircraft must stop when ILS signals are active.

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