16-18GTN 725/750 Pilot’s Guide 190-01007-03 Rev. CForewordGettingStartedAudio &Xpdr CtrlCom/NavFPLDirect-ToProcChartsWpt InfoMapTrafflcTerrainWeatherNearestServices/MusicUtilitiesSystemMessagesSymbolsAppendixIndex3. While viewing the System Setup page, touch the Time Formatkey to select local 12 hour, local 24 hour, or UTC time.Touch Key to SelectTime FormatFigure 16-18 Select System Time Format4. Touch the key for the desired time format.16.4.1.2 Com Channel SpacingCom transceiver channel spacing may be selected between 8.33 kHz and25.0 kHz.While viewing the System Setup page, touch Channel Spacingto toggle between 8.33 kHz and 25.0 kHz channel spacing.16.4.1.3 Nearest Airport CriteriaNearest Airport Criteria defines the surface type and minimum runway lengthused when determining the 25 nearest airports to display on the Nearest AirportPage. A minimum runway length and/or surface type may be entered to preventairports with small runways, or runways that do not have an appropriate surface,from being displayed. The default settings are “0 feet (or meters)” for runwaylength and “any” for runway surface type.Touch To SelectRunway Surface TypeTouch To Select MinimumRunway LengthFigure 16-19 Select Nearest Airport Criteria