Garmin GTX 335 Pilot's Manual - Page 13
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2 GTX 3X5 CONTROLS
The GTX 3X5 series transponders share a common pilot interface. The centerpiece is a
sunlight-readable, auto-dimming display, surrounded by the familiar Garmin
transponder keypad layout. The keys provide instant flight crew access to the core
transponder controls and efficient access to additional GTX 3X5 features.
2.1
Power Control Keys
2.2
Mode Selection Keys
NOTE
GND mode is no longer supported by the transponder system. Always
operate the transponder in ALT mode while in controlled airspace, in
accordance with 14 CFR 91.215(d). For guidance on transponder
operation, refer to the FAA Aeronautical Information Manual (AIM),
4-1-20(a)(3).
When on the ground or in the air, always operate the transponder in ALT mode, unless
otherwise requested by ATC. It is acceptable to go directly from OFF to ALT mode,
with no need to place in SBY mode for a "warm up" period. The transponder
automatically determines whether the aircraft is in the air or on the ground and sends
that information to other aircraft and ATC.
190-01499-00 Rev. A
ON Powers on into ON mode.
ALT Powers on into ALT mode.
OFF Powers off.
SBY Powers on into standby mode.
Garmin GTX 335/345 Pilot's Guide
2 – GTX 3X5 CONTROLS
2-1