Mini Automatic Radar Plotting Aid
Encyclopedia
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
).
Manufacturers use a variety of acronyms for the small crafts or yacht, e.g. MARPA (mini or manual ARPA, depending on which company you talk to) is the dominant one. MARPA, ATA (automatic tracking aid), and ARP (automatic radar plotting) all similar functions to ARPA
. The major difference of this Radar plotting aids may not be fully equivalent to all ARPA performance standard of IMO approved type which is a mandatory requirement for large ocean-going ships. Therefore, they are less expensive for small craft.
Radar
Radar is an object-detection system which uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio...
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
Automatic Radar Plotting Aid
A marine radar with automatic radar plotting aid capability can create tracks using radar contacts. The system can calculate the tracked object's course, speed and closest point of approach , thereby knowing if there is a danger of collision with the other ship or landmass.Development of ARPA...
).
Manufacturers use a variety of acronyms for the small crafts or yacht, e.g. MARPA (mini or manual ARPA, depending on which company you talk to) is the dominant one. MARPA, ATA (automatic tracking aid), and ARP (automatic radar plotting) all similar functions to ARPA
Automatic Radar Plotting Aid
A marine radar with automatic radar plotting aid capability can create tracks using radar contacts. The system can calculate the tracked object's course, speed and closest point of approach , thereby knowing if there is a danger of collision with the other ship or landmass.Development of ARPA...
. The major difference of this Radar plotting aids may not be fully equivalent to all ARPA performance standard of IMO approved type which is a mandatory requirement for large ocean-going ships. Therefore, they are less expensive for small craft.