190-00906-01
GTX 23 Installation Manual
Rev. C
Page 1-3
1.3.1.1 Installation Approval of Version 1 ADS-B Systems
GTX 23 w/ES transponders running software versions v6.00 through v6.20 support Version 1 ADS-B Out
functionality. According to AIR-130 Policy Memo ‘
Approval for ADS-B Out Systems’
, dated August 30,
2010, the FAA has suspended field approvals of Version 2 ADS-B Out equipment. At the time of this
publication, there is currently no FAA policy addressing field approvals of Version 0 or Version 1 systems.
GTX 23 w/ES transponders with Version 1 ADS-B remain eligible for field approval.
There are three options for installers wanting to install GTX 23 w/ES transponders with software versions
6.00 through 6.20:
1. Installers may elect to disable the ADS-B Extended Squitter function, as described in
2. Installers may utilize a Supplemental Type Certificate (STC) for the GTX 330 with the Version 1
ADS-B Extended Squitter activated.
3. Installers may obtain a field approval with the Version 1 ADS-B Extended Squitter activated.
EASA AMC 20-24 compliance matrix provided in Appendix B may be used to assist installers in
showing compliance to the AMC requirements. This data together with Form 337 may be used for
approval by the appropriate FSDO inspector.
1.3.1.2 Installation Approval of Version 2 ADS-B Systems
GTX 23 w/ES transponders running software versions v7.01 and later support Version 2 ADS-B Out
functionality. According to AIR-130 Policy Memo ‘Approval for ADS-B Out Systems’, dated August 30,
2010, a Supplemental Type Certificate (STC) is required for the approval of Version 2 ADS-B Out
equipment.
There are two options for installers wanting to install GTX 23 w/ES transponders running software
versions v7.01 and later:
1. Installers may elect to disable the ADS-B Extended Squitter function, as described in
2. Installers must utilize a Supplemental Type Certificate (STC) for the GTX 23 with the Version 2
ADS-B Extended Squitter activated.
NOTE
It is the installer’s responsibility to ensure the ADS-B Out system is compliant with
AC 20-165 and to ensure compatibility between the GTX 23 and the ADS-B Out position
source equipment. See Garmin ADS-B Out Compatible Equipment (190-01533-00) for
compatible equipment shown to be eligible for 14 CFR 91.227-compliant installations in
accordance with AC 20-165
1.4 TIS System Capabilities
Traffic Information Service (TIS) provides a graphic display of traffic advisory information in the cockpit
for non-TCAS equipped aircraft.
TIS is a ground-based service providing relative location of all transponder equipped aircraft within a
specified service volume. The TIS ground sensor uses real time track reports to generate traffic
notification.
Traffic display is available to aircraft equipped with a Mode S data link such as the Garmin GTX 23
transponder. Traffic can then be displayed on a Garmin GDU Primary Flight Display, or GNS 400W/
500W-series unit.
Surveillance data includes all transponder equipped aircraft within the coverage volume. Aircraft without
an operating transponder are invisible to TIS. TIS displays traffic within seven nautical miles from 3000
feet below to 3500 feet above the requesting aircraft.
