16.7 Collision AvoidanceThe Radar and Chart applications include featuresto help increase your awareness for the potential forcollisions.Collision Avoidance features include:AIS Vessels and aids equippedwithAIStransmitters,thatarewithinrangecanbedisplayedas targets.Refer to Chapter 12 AIS(Automatic IdentificationSystem) for details.Chart andRadarapplicationsMARPA MARPA (Mini AutomaticRadar Plotting Aid) improvescollision awareness bytracking acquired targetsand calculating their speedand course to enable riskanalysis.Refer to 16.8 MARPAoverviewfor details.Chart andRadarapplicationsTargetInterceptionThe Target interceptionfeature tracks AIS targets inrelation to your own vessel’sCourse Over Ground (COG)and Speed Over Ground(SOG). The purpose ofthis feature is to help youdetermine if you need tochange your speed and / orcourse to avoid danger.Refer to 12.9 CollisionAvoidance for details.ChartapplicationGuard ZoneAlarmThe Guard Zone Alarm willwarn you if Radar returns aredetected within the specifiedGuard Zone limits.Refer to 16.11 Setting up aGuard Zone Alarmfor details.RadarapplicationDangeroustargetsAIS and acquired MARPAtargets are considereddangerous if the target willget closer to your vessel thanthe specified Safe Distancewithin the specified Time toSafe Distance.Refer to 12.8 Dangeroustargets for details.Chart andRadarapplicationsVRM/EBL The VRM/EBL feature can beused to assess how far awayan acquired MARPA target isand its bearing.Refer to 16.14 Distances,range, and bearingfor details.RadarapplicationTrails Trails (also known as wakes)show a history of the targetsposition over a specified timeperiod.Refer to 16.12 Trails fordetails.Radarapplication234 LightHouse MFD operation instructions
