Section 914
GARMIN GTX 327Transponder
914 - 4
Page Date: 15. December 2005
Pilot´s Operating Handbook
EXTRA 300L
914.1.2
CODE SELECTION
Code selection is done with eight keys (
0 - 7
) that provide 4,096 active identification codes. Pushing
one of these keys begins the code selection sequence. The new code will not be activated until the
fourth digit is entered. Pressing the
CLR
key will move the cursor back to the previous digit. Pressing
the
CLR
key when the cursor is on the first key of the code, or pressing the
CRSR
key during code
entry, will remove the cursor and cancel data entry, restoring the previous code. The numbers
8
and
9
are not used for code entry, only for entering a Count Down time, and in Configuration Mode.
IMPORTANT CODES:
1200 The VFR code for any altitude in the US (Refer to ICAO standards elsewhere)
7000 The VFR code commonly used in Europe (Refer to ICAO standards)
0021 The VFR code commonly used in Germany (default is set to 0021 at time of
installation)
7500 Hijack code (Aircraft is subject to unlawful interference)
7600 Loss of communications
7700 Emergency
7777 Military interceptor operations (Never squawk this code)
0000 Military use (Not enterable)
Care should be taken not to select the code 7500 and all codes in the 7600-7777 range, which
trigger special indicators in automated facilities. Only the code 7500 will be decoded as the hijack
code. An aircraft’s transponder code (if available) is utilized to enhance the tracking capabilities
of the ATC facility, therefore care should be taken when making routine code changes.
914.1.3
KEYS FOR OTHER GTX 327 FUNCTIONS
IDENT
Pressing the
IDENT
key activates the Special Position Identification (SPI) Pulse for 18 seconds,
identifying your transponder return from others on the air traffic controller’s screen. The word
‘
IDENT
’ will appear in the upper left corner of the display while the IDENT mode is active.
VFR
Sets the transponder code to the pre-programmed VFR code selected in the Configuration Mode.
Pressing the
VFR
key again will restore the previous identification code.
START/STOP
Starts and stops the Count Up and Count Down timers.
CRSR
Initiates entry of starting time for the Count Down timer and cancels transponder code entry.
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