Garmin GTN 750 Pilot's Guide - Page 349

16.2.3 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 Audio & 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 FPL Area Within The Circle Of Uncertainty Ownship Symbol Direct-To Proc Charts Wpt Info Map Figure 16-7 Circle of Uncertainty Traffic Terrain Weather Nearest Music Utilities System Messages Symbols Appendix 190-01007-03 Rev. B Garmin GTN 725/750 Pilot's Guide 16-11 Index