Garmin G3X Pilots Guide - Page 129

System Overview Flight Instruments EIS CNS Interface GPS Navigation CNS Interface GROUND MODE Ground Mode is normally selected automatically when the aircraft is on the ground. The transponder powers up in the last mode it was in when shut down. To manually select Ground Mode, press and hold the STBY Softkey. A green GND indication and transponder code appear in the mode field of the Transponder Data Box and the STBY Softkey becomes the GND Softkey. In Ground Mode, the transponder does not allow Mode A and Mode C replies, but it does permit acquisition squitter and replies to discretely addressed Mode S interrogations. Deselect (press) the GND Softkey to return to Standby Mode. STANDBY MODE (MANUAL) Standby Mode can be selected at any time by pressing the STBY Softkey. In Standby, the transponder does not reply to interrogations, but new codes can be entered. When Standby Mode is selected, a white STBY indication and transponder code appear in the mode field of the Transponder Data Box. MANUAL ON MODE ON Mode can be selected at any time by pressing the ON Softkey. ON Mode generates Mode A and Mode S replies, but Mode C altitude reporting is inhibited. In ON Mode, a green ON indication and transponder code appear in the mode field of the Transponder Data Box. ALTITUDE MODE (AUTOMATIC OR MANUAL) Altitude Mode is automatically selected when the aircraft becomes airborne. Altitude Mode may also be selected manually by pressing the ALT Softkey. If Altitude Mode is selected, a green ALT indication and transponder code appear in the mode field of the Transponder Data Box, and all transponder replies requesting altitude information are provided with pressure altitude information. Flight Planning Hazard Avoidance Additional Features Integrated Autopilot Annun/Alerts Appendix Index 190-01115-00 Rev. F Garmin G3X Pilot's Guide 111