automated radar plotting aid

automated radar plotting aid

[′ȯd·ə‚mād·əd ¦rā‚där ′pläd·iŋ ‚ād]
(navigation)
A marine computer-based anticollision system that automatically processes time coordinates of radar echo signals into space coordinates in digital form, determines consecutive coordinates and motion parameters of targets, calculates the predicted closest point of approach and time to closest point of approach and presents them in graphic or alphanumeric form on the radar display, and switches on alarms if there is a danger of collision.
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GTEC's Automated Radar Plotting Aid (ARPA) incorporates collision avoidance data into a radar display to give users a clear picture of other vessels in the area by providing their headings, speeds and alerts for potential collisions.

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