84 GPSMAP® 4000/5000 Series Owner’s ManualRadarRadar Overlay Display AppearanceAdjusting Gain and Clutter on the Radar OverlaySee “About Gain and Clutter” (page 75).Setting the Radar Overlay Display OrientationSee “Changing the Map Orientation” (page 10).Setting Data Bars for the Radar OverlaySee “Data Bar Settings” (page 80).Tracks and Waypoints SettingsShowing Tracks on the Radar OverlayYou can set whether vessel tracks appear on the Radar Overlay.From the Home screen, select Charts > Radar overlay > Menu > Waypoints & tracks > tracks > on.Managing TracksSee “Tracks” (page 36).Selecting a Waypoint Label TypeYou can select the type of labels shown with waypoints on the Radar Overlay.1. From the Home screen, select Charts > Radar overlay > Menu > Waypoints & tracks > WaypointDisplay > Display.2. Complete an action:• Select Label to identify waypoints using labels.• Select Comment to show comments as waypoint labels.• Select Symbol to identify waypoints using symbols.Managing WaypointsSee “Waypoints” (page 32).Alarms and Other Vessel SettingsSetting the Safe-zone Collision AlarmSee “Setting the Safe-zone Collision Alarm” (page 18).Viewing a List of AIS and MARPA ThreatsSee “Viewing a List of AIS and MARPA Threats” (page 69).Showing Other Vessels on the Radar OverlayAIS requires the use of an external AIS device and active transponder signals from other vessels.You can configure how other vessels appear on the Radar Overlay. The display range setting configured for theRadar Overlay is applied only to the Radar Overlay. The details and projected heading settings configured forthe Radar Overlay are also applied to all radar modes.1. From the Home screen, select Charts > Radar overlay > Menu > other Vessels > Display Setup.2. Complete an action:• Select Display Range to indicate the distance from your location in which AIS vessels appear. Select adistance.• Select Details > Show to show details about AIS-activated and MARPA-tagged vessels.• Select Proj. Heading to set the projected heading time for AIS-activated and MARPA-tagged vessels.Enter the heading. Select Done.• Select trails to show the tracks of AIS vessels, and select the length of the track that appears using atrail.