Mini Automatic Radar Plotting Aid

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Mini Automatic Radar Plotting Aid (or MARPA) is a radar feature for target tracking and collision avoidance. Targets must be manually selected, but are then tracked automatically, including range, bearing, target speed, target direction (course), CPA (closest point of approach), and TCPA (time of closest point of approach), safe or dangerous indication, and proximity alarm. MARPA is a more basic form of ARPA (Automatic Radar Plotting Aid).

[edit] See also

• Automatic Radar Plotting Aid (ARPA)

[edit] References

• Maptech: Using ARPA, MARPA, and Radar with Chart Navigator Pro
• Raymarine: MARPA Target Tracking and Collision Avoidance