Garmin G3X Pilot’s Guide 190-01115-00 Rev. GAppendix B324SystemOverviewFlightInstrumentsEISCNSInterfaceGPSNavigationFlightPlanningHazardAvoidanceAdditionalFeaturesIntegratedAutopilotAnnun/AlertsAppendixIndexEPE CIRCLEEstimated Position Error (EPE) indicates the accuracy of the position fix. EPE usesDilution of Precision (DOP) and other factors to calculate a horizontal position error.DOP measures satellite geometry quality (i.e., number of satellites received and wherethey are relative to each other).Setting up and customizing the EPE circle for the map page:1) From the Map Page press the MENU Key.2) Turn or move the FMS Joystick to highlight ‘Set Up Map’ and press theENT Key.3) Turn the FMS Joystick to select the ‘Miscellaneous’ from the horizontal list.4) Move the FMS Joystick to highlight the desired feature.5) Turn the FMS Joystick to select ‘On’ or ‘Off’, and press the ENT Key.PROXIMITY WAYPOINTSThe Proximity Waypoints Page allows the pilot to define an alarm circle around awaypoint location.Proximity Waypoint AlarmProximityAlarmProximityCircleDefining proximity waypoints:1) Press the MENU Key twice to open the Main Menu.2) Turn or move the FMS Joystick to highlight ‘User Waypoints’, and press theENT Key.