Garmin GTN 650 Pilot's Guide - Page 289

15.2.3 Circle of Uncertainty Foreword The Circle of Uncertainty depicts an area where the ownship location is guaranteed to be when the aircraft location cannot be accurately determined. Getting Started The area of the Circle of Uncertainty becomes larger as GPS horizontal accuracy degrades and smaller as it improves. The Circle of Uncertainty is shown only Xpdr Ctrl when the aircraft is on the ground. The Circle of Uncertainty area is transparent so that features within it may still be seen. Com/Nav Area Within The Circle Of Uncertainty Ownship Symbol FPL Direct-To Proc Wpt Info Figure 15-9 Circle of Uncertainty 15.3 External LRUs Map The External LRU page displays the external equipment connected to the Traffic GTN and their connection status. Terrain 1. While viewing the System page, touch the External LRUs key. Weather LRU Available And Communicating Nearest LRU Not Available Or Communicating Music Touch For More Information Utilities Figure 15-10 External LRU Page System 2. When more information is available about the listed units, touch the More Info key to view the information. Messages Symbols Appendix Index 190-01004-03 Rev. B Garmin GTN 625/635/650 Pilot's Guide 15-11