How quickly should the ARPA present a motion trend?

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Multiple Choice

How quickly should the ARPA present a motion trend?

Explanation:
The idea is to keep the navigator’s view of a target’s future path as fresh as possible. ARPA calculates a motion trend using recent position updates to estimate the target’s velocity and turn rate, which lets you predict where it will be in the near future. Because ships can change speed or course quickly, updating this trend within a short time frame is essential for timely decisions. If the motion trend were updated much later—say after several minutes—the information could be outdated, reducing your ability to assess collision risk and take early evasive or corrective action. Updating within one minute provides the quickest, most actionable indication of how the target is moving now and where it’s likely headed next.

The idea is to keep the navigator’s view of a target’s future path as fresh as possible. ARPA calculates a motion trend using recent position updates to estimate the target’s velocity and turn rate, which lets you predict where it will be in the near future. Because ships can change speed or course quickly, updating this trend within a short time frame is essential for timely decisions. If the motion trend were updated much later—say after several minutes—the information could be outdated, reducing your ability to assess collision risk and take early evasive or corrective action. Updating within one minute provides the quickest, most actionable indication of how the target is moving now and where it’s likely headed next.

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