The Mini-GA is a portable electronic device especially designed for the certified aircraft, bringing terrain and obstacles to your panel. It is a reassuring reference when flying in instrument conditions, and greatly improves situational awareness, VFR or IFR. Internal or external GPS navigation and steering data is provided on the PFD. Highway-in-the sky guidance is provided to any runway in the database. It is a complete EFIS, incorporating the same technology that made GRT Avionics famous for its high-integrity attitude sensing (AHRS) in the experimental airplane market. It can be installed in minutes to update a traditional panel, or provides a valuable addition to any panel, at an unbeatable price.
As A Primary Flight Display
Here the primary flight display flight display screen terrain showing relative height. In the upper left the autopilot/flight director mode is shown as synthetic approach to runway 35. The flight director is commanding a slight pitch down in the center of the screen. The airspeed and altimeter drums move smoothly and the high-contrast digits make them highly readable. Extending up from the runway is the way-point balloon.
A Full-Featured Moving Map
The moving map in arc-view mode. Notice the color-coded terrain. The moving map has the features you would only expect to find in a full EFIS. It includes such features as terrain relief, relative terrain height color coding, nearest functions, airport details including frequencies and runways, and much more. When connected to an external GPS, its flight plan and steering information can be displayed on and drive the map.
Smooth Rotation Moving Map
Hand-held or panel mount GPS navigators update their display once per second. Some EFIS based moving maps do same. The result is a jerky and delayed map. The Mini-GA combines AHRS and GPS data to update its map at up to 15 times per second, resulting in a smoothly rotating map. Rolling out of a turn precisely on track becomes easy and the extended runway centerlines eliminate the guess work, making navigation easier and more precise.
Navigation Head with HSI
The Mini-GA extends its role by coupling to other navigation sources, such as navigation radios. The Mini includes and OBS (radial) selector for VOR or LOC/ILS navigation. Lateral and vertical deviations are also displayed on the primary flight display.
Mounts in Minutes
Heads-Up Display Capable
A heads up display can now be part your your GRT Avionics equipped airplane for as little as $300. Our pursuit of heads up display technology has led to support for the Hudly automotive after-market heads up display. Graphics optimizations in the GRT remote app, combined with the impressive readability and value of the Hudly have resulted in the first practical heads up display for experimental and general aviation (certified) airplanes.
Aircraft mounted heads-up display
Sunlight Readable Color Symbology
Primary Flight Data
Flight Director and HSI Guidance
Lateral/Vertical Deviation for Approach
Stall warning and all other features of GRT Remote app
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 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.
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. You can use this with services such as SavvyAnalysis.com or Emarit Ranu’s Excell based Flight Data Analysis Tool. 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
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
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)
Dual Electronics XGPS170D
Dual Electronics XGPS190
Flight Data Systems Pathfinder
Free Flight Systems XPLORER
iLevil Technologies iLevil AW
iLevil Technologies iLevil SW
ADS-B Out Only
ADS-B UAT (In and Out)
Free Flight Systems RANGR-FDL-978-XVR
PS Engineering PAC15EX
PS Engineering PDA360XR
PS Engineering PRI30EX
GRT Auto-pilot Servos
Trio Auto-pilot (requires control head)
TruTrak Auto-pilot (requires control head)
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 format
GRT Avionics Safe-Fly 2020
All types with serial output
Avidyne IFD 440/540/550 Series
Garmin GNS430/530 Series
Garmin GTN650/750 Series
Vertical Power (All Models)
Weather (non ADS-B)
Insight Avionics Strike Finder
L3 Stormscope WX-500
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.