GPSMAP 5000 Series Owner’s Manual Using RadarUSinGradarTo enable the guard zone:From the Home screen, touch Radar > Sentry > Menu > Sentry Setup > Enable Guard Zone.To adjust the guard zone boundaries:1. While the guard zone is on, from the Radar screen, touch Menu > Sentry Setup > Adjust GuardZone > Move Guard Zone.2. Select from the following options:Corner 1 (and Corner 2): Defines a guard zone that does not completely encompass theboat. Touch Corner 1, and then touch the point on the screen at which you want the firstcorner of the guard zone. Repeat this with Corner 2.Circular: Joins the guard zone to completely encompass the boat. Use Corner 1 or Corner 2to adjust the size.Corner Corner 2 CircularRadar TargetingNote: MARPA requires the use of a heading sensor. The heading sensor must output the NMEA 0183sentence HDM or HDG.1. From the Radar screen, touch the target location to begin targeting. As you move the target overobjects on the radar, target options appear along the right side of the screen.Cruising Screen - TargetingHeading lineTargetTarget options2. Select an option:Select Create Waypoint to mark a waypoint at the targeted object or location.Select Acquire Target to assign a MARPA (Mini Automatic Radar Plotting Aid) tag to thetargeted object.Select Drop VRM/EBL to set the Variable Range Marker (VRM) and Electronic Bearing Line(EBL) to measure range and bearing to a target.•••••