viiiGarmin GTN 625/635/650 Pilot’s Guide 190-01004-03 Rev. FForewordGettingStartedXpdr CtrlCom/NavFPLDirect-ToProcWpt InfoMapTrafflcTerrainWeatherNearestMusicUtilitiesSystemMessagesSymbolsAppendixIndex1.7 Selecting Com Frequencies ................................................................. 1-151.8 Flight Planning .................................................................................. 1-171.8.1 Creating a Flight Plan .......................................................... 1-171.9 IFR Procedures ................................................................................... 1-181.10 Dead Reckoning................................................................................. 1-192 Transponder Controls (Optional).........................................................2-12.1 Select Transponder ............................................................................... 2-22.2 IDENT .................................................................................................. 2-22.3 Transponder Mode ............................................................................... 2-32.3.1 Standby................................................................................. 2-32.3.2 Ground ................................................................................. 2-42.3.3 On ........................................................................................ 2-42.3.4 Altitude Reporting ................................................................. 2-52.4 VFR ..................................................................................................... 2-52.5 Selecting a Squawk Code ..................................................................... 2-62.6 GDL 88 ADS-B Reporting ..................................................................... 2-72.7 Extended Squitter Transmission ............................................................ 2-93 NAV/COM .............................................................................................3-13.1 Volume ................................................................................................ 3-23.2 Squelch ............................................................................................... 3-23.3 Com and Nav Frequency Window and Tuning ....................................... 3-33.3.1 Com and Nav Frequency Finding ............................................ 3-53.3.1.1 Find Recent Frequencies ........................................................ 3-53.3.1.2 Find Nearest Frequencies ....................................................... 3-63.3.1.3 Find Flight Plan Frequencies................................................... 3-73.3.1.4 Find User Frequencies ............................................................ 3-83.3.2 Adding a New User Frequency ............................................... 3-83.3.3 Emergency Frequency .......................................................... 3-103.3.4 Stuck Microphone ............................................................... 3-113.3.5 Remote Frequency Selection Control .................................... 3-113.4 Com Frequency Monitoring ................................................................ 3-123.5 Nav (VOR/Localizer/Glideslope) Receiver Operations ........................... 3-133.5.1 Ident Audio and Volume ...................................................... 3-133.5.2 Nav Tuning Window............................................................. 3-143.5.3 Nav Frequency Finding ........................................................ 3-15