Page 16
GTX 320/320A Installation Manual
Rev L
190-00133-01
Important Codes:
•
1200
The VFR Code for any altitude
•
7600
Loss of Communications
•
7500
Hijack (Never assigned by ATC without prior notification of the pilot that his or her aircraft is
subject to unlawful interference)
•
7700
Emergency
•
7777
Military Interceptor Operations (Never squawk this code.)
•
0000
Military use (Never squawk this code.)
See the Aeronautical Information Manual (AIM) for a detailed explanation of identification codes.
3.2.3 IDENT Button
On occasion, the controller will request “SQUAWK IDENT”. Respond by momentarily pressing and releasing
the IDENT button. Pressing the IDENT button activates the Special Position Identification Pulse (SPI) for
approximately 20 seconds identifying your transponder return from other aircraft on the controller’s scope.
3.2.4 Reply Light
The reply light will blink each time the transponder replies to ground interrogation. The reply light also remains
lit during the IDENT time interval.
