Garmin GTN 650 Pilot's Guide - Page 45

2.3.4 Altitude Reporting Foreword 1. Touch the Mode key and select Altitude Reporting and then touch the Enter key for Mode C operation. Getting Started Xpdr Ctrl Active XPDR and IDENT Enabled Transponder Operation "Altitude Reporting" Mode Com/Nav FPL Figure 2-10 Transponder Mode "Altitude Reporting" Indication Direct-To 2. The transponder will be "On" and will transmit its squawk Proc code and altitude when interrogated. An "ALT" annunciation will appear when the squawk code is transmitted. Wpt Info 2.4 VFR Map Touch the VFR key to set the VFR squawk code (1200). Traffic VFR (1200) Transponder Squawk Code Figure 2-11 Transponder VFR Squawk Code Terrain Weather Nearest Music Utilities System Messages Symbols Appendix Index 190-01004-03 Rev. B Garmin GTN 625/635/650 Pilot's Guide 2-5