Automatic Radar Plotting Aid (ARPA)

Automatic Radar Plotting Aid (ARPA) is a navigational tool used on ships to automatically detect, track, and analyze the movements of other vessels in the vicinity. It processes radar data to calculate target speed, heading, and closest point of approach, providing navigators with real-time information to assess potential collision risks. This technology enhances situational awareness, allowing for safer and more efficient route planning, especially in congested waters. By automating target tracking and collision predictions, ARPA assists mariners in making informed decisions to avoid accidents.