Which of the following is NOT a required operational warning on ARPA?

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Multiple Choice

Which of the following is NOT a required operational warning on ARPA?

In ARPA operation, warnings are alerts that require the operator’s attention because they indicate potential safety or tracking issues. The maneuvering warning alerts you when a target is changing speed or direction, which affects predicted positions and collision risk. The loss of contact warning signals that the radar tracker can no longer maintain a reference to a target, so you need to reacquire or reassess. The radar shadow warning points out when the vessel’s own structure blocks part of the radar beam, creating undetected areas that could hide a threat. Automatically Acquired Target is not a warning; it’s a status indicating that ARPA has automatically acquired and is tracking a target. It describes a normal operational condition rather than an alert requiring action. The other three are explicit warnings, while this one is about automatic tracking behavior.

In ARPA operation, warnings are alerts that require the operator’s attention because they indicate potential safety or tracking issues. The maneuvering warning alerts you when a target is changing speed or direction, which affects predicted positions and collision risk. The loss of contact warning signals that the radar tracker can no longer maintain a reference to a target, so you need to reacquire or reassess. The radar shadow warning points out when the vessel’s own structure blocks part of the radar beam, creating undetected areas that could hide a threat.

Automatically Acquired Target is not a warning; it’s a status indicating that ARPA has automatically acquired and is tracking a target. It describes a normal operational condition rather than an alert requiring action. The other three are explicit warnings, while this one is about automatic tracking behavior.

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