Icom MR1010RII 4kW Marine Radar Color LCD [MR1010R2 23]MR1010RII 4kW Marine Radar Color LCD Simplified ARPA (Automatic Radar Plotting Aids) Function* The simplified ARPA function helps to prevent a collision risk with other vessels or objects. Up to five targets can be automatically tracked on the radar echo, when a target enters within the set watch area, (or up to ten targets can be tracked when manually set). By selecting one of the targets, the target information such as position, course, speed, CPA,