An ARPA Target is displayed on an ECDIS screen as which symbol?

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Multiple Choice

An ARPA Target is displayed on an ECDIS screen as which symbol?

Explanation:
An ARPA target is a tracked radar contact, and the standard display choice for such a moving target on an ECDIS screen is a circle. The circle provides a clear, unambiguous marker that stays legible as scale changes and contrast varies, signaling a dynamic contact that ARPA/MARPA is actively tracking. It distinguishes the target from fixed chart features and from the own-ship symbol, which helps the navigator quickly assess potential collision or crossing situations. Other shapes are reserved for different object types or chart elements, so the circle is the most appropriate and recognizable symbol for a tracked ARPA target.

An ARPA target is a tracked radar contact, and the standard display choice for such a moving target on an ECDIS screen is a circle. The circle provides a clear, unambiguous marker that stays legible as scale changes and contrast varies, signaling a dynamic contact that ARPA/MARPA is actively tracking. It distinguishes the target from fixed chart features and from the own-ship symbol, which helps the navigator quickly assess potential collision or crossing situations. Other shapes are reserved for different object types or chart elements, so the circle is the most appropriate and recognizable symbol for a tracked ARPA target.

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