Ground; Altitude Reporting; Vfr - Garmin GTN 725 Pilot's Manual

2.1.4

Ground

Touch the Ground key to place the transponder into Ground
mode. Mode S replies will be allowed in Ground mode. Refer to
the transponder's pilot's guide for more information regarding
transponder behavior in Ground mode.
Transponder Operation "Ground" Mode
Figure 2-5 Transponder Mode "Ground" Indication
2.1.5 On
Touch the On key for Mode A operation. The transponder is
"On" and will transmit its squawk code when interrogated.
Transponder Operation "ON" Mode
2.1.6

Altitude Reporting

1. Touch the Altitude Reporting key for Mode C operation.
2. The transponder will be "On" and will transmit its squawk
code and altitude when interrogated. An "ALT" annunciation
will appear when the squawk code is transmitted.
2.1.7

VFR

Touch the VFR key to set the VFR squawk code (1200).
VFR (1200) Transponder Squawk Code
190-01007-03 Rev. D
Active XPDR and IDENT Enabled
Figure 2-6 Transponder Mode "ON" Indication
Figure 2-7 Transponder VFR Squawk Code
Garmin GTN 725/750 Pilot's Guide
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