Garmin aera 500 Series Pilot’s Guide 190-01117-02 Rev. CAppendix G188OverviewGPS NavigationFlight PlanningHazard AvoidanceAdditional FeaturesAppendicesIndexNOTE:This information is only for flight planning purposes. Consult theaircraft’s pilot operating handbook for the official weight and balance data.Weight & BalanceEPE 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 navigation map:1) From the 'Home' Screen, touch Map > Menu > Set Up Map.2) Touch the buttons to display the 'Misc' Category.3) Touch EPE Circle.4) Touch the On/Off Button.
