GPS Specific Status
Detailed data about the performance of the GPS, including the number of satellites being tracked, the
signal strengths, etc., is available on the Set Menu, Display Unit, GPS Status. If more than one GPS is
connected to the EFIS, be sure to select this GPS.
Approved Devices – Wiring and Configuration
Trig TT21/TT22
Note: All steps in the “Safe-Fly/SPC Configuration” section above must be completed before the
following settings are made.
Use of the Safe-Fly GPS for the Trig TT21/TT22 is approved by GRT Avionics when installed and
configured as described in this section for experimental category airplanes. This installation meets the
requirements of FAR 91-227(c), when wired as shown below, and configured as indicated.
The minimum software versions required are as follows:
Device
Minimum
Software Version
Safe-Fly GPS
2
Trig Adapter (if used)
5
Trig TT22
SW2.7
Configuration
Setting
Required Selection
SPC Serial Port 1 Rate
38400
SPC Serial Port 1 Output
Safe Fly NN33
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Safe-Fly 2020 GPS – Rev P GRT Avionics, Inc
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