What is the persistence (or afterglow) feature used for?

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Multiple Choice

What is the persistence (or afterglow) feature used for?

Persistence, or afterglow, keeps recent radar echoes on the screen long enough to form a trail of the target’s recent positions. This trail lets you see how the target has been moving and quickly judge whether it’s maintaining course or starting to turn, giving you an early indication of maneuvers. The trailing image is especially useful for spotting subtle changes in direction that aren’t obvious from a single snapshot. This feature isn’t about measuring signal strength (that’s related to echo amplitude and radar gain), nor about adjusting display brightness, and it doesn’t calculate ownship speed (which comes from other sensors and data).

Persistence, or afterglow, keeps recent radar echoes on the screen long enough to form a trail of the target’s recent positions. This trail lets you see how the target has been moving and quickly judge whether it’s maintaining course or starting to turn, giving you an early indication of maneuvers. The trailing image is especially useful for spotting subtle changes in direction that aren’t obvious from a single snapshot.

This feature isn’t about measuring signal strength (that’s related to echo amplitude and radar gain), nor about adjusting display brightness, and it doesn’t calculate ownship speed (which comes from other sensors and data).

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