Code Selection - Garmin GTX 327 Pilot's Manual

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 digit 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 the 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)
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 (when available) is utilized to enhance the
tracking capabilities of the ATC facility, therefore care should be taken when making routine
code changes.
Keys for Other GTX 327 Functions
IDENT
(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
Configuration Mode (this is set to 1200 at the factory). Pressing the VFR key again
will restore the previous identification code.
Pressing the IDENT key activates the Special Position Identification