3/17/2025 Important Update for EFIS+Safe-Fly+echoUAT customers: If you have the Safe-Fly serial control interface wired, see the Safe-Fly GPS software page for an important update.
This section contains software in the development or testing stage for customers interested in testing new features before a final release. The software below may be incomplete or have unexpected behavior. Never use in instrument conditions or other situations where EFIS failure or unexpected behavior will affect safety of flight.
The most current release of the AHRS software is included in the Display Unit update files. Most GRT EFIS users will never need to use this page. However, there are times when customers request AHRS-only updates or would like to try beta testing new AHRS software.
All versions of the GRT EFIS with a MAP page (except Mini) contain a checklist function (with recent software). The checklists must be created on a computer in plain text format and loaded into the EFIS as CHECKLIST.TXT. A text editor such as Notepad will work.
Emarit Ranu’s Excel-based Flight Data Analysis Tool can open demo files in Excel to make graphs, compute statistics, and show flight paths on Google Earth.
Carl Morgan’s Demo File Decoder can load flight data into a spreadsheet & plot GPS data on Google Earth.
Copy the files inside these ZIP files to your USB memory stick to play back some recorded approaches and weather on your EFIS. *Note that any demo file can be played on any GRT EFIS, regardless of which model it was recorded on.
Allows EIS recorded data to be decoded in spreadsheet form. Record on your EFIS memory stick or to a laptop and decode the file with this software. Version 11 3/09/2015
The GRT Remote App offers many tools to ease pilot workload for flight planning, radio tuning and offers support for the Hudly Heads-Up-Display. It is also a unique and simple solution for back-seat flight instruments and controls for radios and flight planning. Version 2.3.0 Updated 1/05/2017 Install issue: The latest Android 14 refuses to install this old version. We are working on an update.
Version 5 adds support for more types of compliant GPS data and supports sending air data for ADS-B air-ground switching by setting Squat Switch to AHRS and GPS data (requires display software update). Version 5 released 7/6/2017
Navigation Database
3/17/2025 Important Update for EFIS+Safe-Fly+echoUAT customers: If you have the Safe-Fly serial control interface wired, see the Safe-Fly GPS software page for an important update.
Note: One Jeppesen data subscription can be shared among all GRT EFIS screens in the airplane. Database sharing is supported by EFIS software versions 2a (HXr), 6a (HX), 10 (SX), all Mini, all EX, and newer versions.
Approach Plates and Charts (Horizon 10.1, HXr and HX only)
GRT Systems are Specifically Designed to Play Nice with Other Manufacturers’ Equipment
Every builder has his or her own taste when it comes to devices such as weather & traffic information, radios, transponders, and GPS units. We strive to give builders a choice when it comes to third-party equipment. This page is an overview of popular choices of our customers, with equipment supplements for some to help you install and use your product to its full potential with a GRT EFIS system. Check this page often for updates, as we are always adding to our equipment supplement library and third-party vendor list.
General list of Compatible Equipment
ADS-B In (traffic and weather)
GRT Discovery ADS-B Receiver
Dual Electronics XGPS170D
Dual Electronics XGPS190
Flight Data Systems Pathfinder
Free Flight Systems XPLORER
iLevil Technologies iLevil AW
iLevil Technologies iLevil SW
Open Flight Solutions Flight Box
Radenna SkyRadar-DX
Radenna SkyRadar-D2-v2
Stratux
ADS-B Out Only
Garmin GTX 330-ES
Trig TT21
Trig TT22
Trig TT31
uAvionix tailBeacon-X
ADS-B UAT (In and Out)
Free Flight Systems RANGR-FDL-978-XVR
uAvionix echoUAT
Audio Panel/Intercom
(Horizon 10.1 only)
PS Engineering PAC15EX
PS Engineering PDA360EX/XR
PS Engineering PMA450EX
PS Engineering PRI30EX
Autopilot
GRT Autopilot Servos
Trio Autopilot (requires control head)
TruTrak Autopilot (requires control head)
Carbon Monoxide
CO Guardian
Comm/Nav Radios
Note: All GRT Avionics EFIS systems can push frequencies to com and nav radios, but only the Horizon 10.1 and HXr EFIS offer full remote control of com, nav radios and intercoms.
Any radio with RS-232 SL30 or SL40 format
Garmin GTR 200 (COM)
Garmin GTR 225 (COM)
Garmin GNC 255 (NAV/COM)
SL30 (NAV/COM)
SL40 (COM)
Trig TY91 (COM) (remote option on 10.1/HXr)
Val Avionics (panel COM and NAV units, or remote COM and NAV units on 10.1/HXr)
GPS Receivers
GRT Avionics Safe-Fly 2020
All types with NMEA0183 serial output (GPRMC) or Aviation format serial output
IFR Navigators
Avidyne IFD 440/540/550 Series
Garmin GNS 430/530 Series
Garmin GPS 175/GNC 355/GNX 375
Garmin GTN 650/750 Series
Power Management
Vertical Power (All Models)
TIS-A Traffic
Garmin GTX330
Trig TT21
Trig TT22
Transponders
Garmin GTX 327 (altitude encoding)
Garmin GTX 330/GTX 330-ES (altitude encoding and TIS-A)
Garmin GTX 345 (altitude encoding and ADS-B In)
Sandia STX165R (remote)
Trig TT21 (remote option)
Trig TT22 (remote option)
Trig TT31 (altitude encoding and TIS-A)
uAvionix TailBeaconX (remote)
Weather (non ADS-B)
L3 Stormscope WX-500
XM Weather
Equipment Supplements
These “mini-manuals” explain how to install and set up popular devices and avionics that work with GRT EFIS systems. You can pick the ones you need, print them out, write notes all over them and store them with your aircraft’s electrical system diagrams. Check back often for new releases or email us for special requests. We often create new supplements based on customer requests and then post them here for everyone’s benefit.
Note: Only Horizon 10.1 and HXr EFIS systems are capable of full remote control of com radios, nav radios, and intercoms.
