Copyright © 2016  Grand Rapids Technologies, Inc.                      

Electronic Flight Instrumentation for Experimental Aircraft Since 1991

7/21/2017 We got the HUD! GRT Exlcusive. Heads-Up Display Now Available - Aircraft Mounted, for as little as $300. Absolutely amazing…

5/04/2017 User manual for the Safe-Fly 2020 GPS has been updated

5/01/2017 uAvionix EchoUAT now available!

4/20/2017 Sport SX, Sport EX and Horizon EX Installation Manual has been updated

Mini-X Installation, Setup and User Manual has been updated

4/19/2017 Serial Combiner/Expander now available! Combines/Expands four serial ports into one.

2/15/2017 Software updates for the Horizon Hxr, Horizon HX, Sport SX, Sport EX and Mini (all models) are now available for download

2/9/2017 Preliminary user manual added for GRT Safe-Fly 2020 ADS-B compatible GPS/Serial Port Combiner

1/31/2017 - Technical Advisory for Autopilot and Magnetometer improvements

1/29/2017 Safe-Fly GPS Announced. An ADS-B compliant GPS source for your ADS-B output, that provides high-integrity navigation data to your GRT EFIS.

1/27/2017 8.4” Horizon HXr Now Shipping -Available in touch, or non-touch

11/23/2016 - Sport EX-SX Install Manual Released

11/10/2016 - Sport/Horizon EX Now Shipping.  

9/23/2016 - ADS-B Recommendations Updated.

7/22/2016 Sport EX Introduced at Oshkosh Airshow - EXpandable - Starting at the EXtraordinary starting price of $1500! A price breakthrough.  

7/22/2016 Horizon EX Introduced at Oshkosh Airshow - Upgrade your GRT Horizon WS to high-resolution, synthetic vision, and more.

7/20/2016 - Seattle Avionics announces a Oshkosh half off special on their VFR+IFR annual subscription for GRT HX & HXr owners.

4/2/2016 8.4” HXr with Touchscreen Option Debuts at Sun ‘n Fun - GRT Safe-Touch

4/2/2016 Revised Pricing - Touchscreen option, lower pricing on servos, and more.

3/23/2016 Support For Stratux (Raspberry Pi-Based) ADS-B Receiver - The open nature of GRT Avionics allows for the use of this popular $100 ADS-B receiver.

2/11/2016 New Mini-GA User Manual

11/22/2015 Carlos Fernandez -

We are saddened to announce that our former employee, Carlos Fernandez, passed away this day.

11/11/2015 ValuSystem Announced -

GRT Avionics introduces ValuSystems… combining any GRT EFIS with Android tablets.

8/27/2015 Version 2.0.0 GRT Android App! -

Download now for access to GRT Vision HUD mode, loadable for the BT-200 Smart Glasses!

8/19/2015 New Feature Set for Mini! - Optional Feature Set with Engine Page,

ADS-B, Audio Output and Bluetooth Link!

7/19/2015 Heads-Up Display - Wearable HUD technology is now available for all GRT EFIS products. The future has arrived.

7/13/2015 Oshkosh 2015 Show Specials -

Place your order now for delivery after the show!  Visit us at the show located in Exhibit Hangar C, booth numbers 3068/3069! Pricing valid from 7/13/15 through 8/3/15.

4/19/2015 Sun ‘n Fun 2015 Show Specials - Introducing the Mini-GA, AOA, and Show Pricing.

4/19/2015 Angle-of-Attack Option Announced - Retrofittable to all Mini-EFIS, SX200A and Adaptive AHRS.

4/18/2015- NavWorx ADS600-EXP Compatibility. Yes, we support it.  

3/05/2015- Audio Alerting for Sport SX, HX and HXr now available in a free software update. Includes Adaptive AHRS support.

2/18/2015- New HX/HXr Pricing. Optional 429 and new AHRS drop prices by $1000+.


2/18/2015- New Adaptive AHRS.

A new AHRS brings added redundancy, simplified installation and magnetometer sharing.

12/19/2014- Mini-AP is now shipping.

A rich, fully featured stand-alone autopilot meets a top notch EFIS in a beautiful package.

12/17/2014- The internal Li-Ion battery option for the Mini is now shipping. This long life built-in user replaceable battery is a perfect match to the Mini EFIS.

10/14/2014- Video tutorial/Oshkosh forum presentation, Flying the HXr in IFR by Jerry Morris, is now posted to YouTube.

10/8/2014- New software updates for Horizon HX/HXr and Sport SX add a variety of great new features, including ADS-B TFRs.

9/18/2014- New Nav Database Update.

9/11/2014- New Mini software updates available. AHRS 51 reduces sensitivity of pitot/static readout. Display v. 1e adds wind vector to Mini-X and AP with magnetometer.

8/27/2014- Oshkosh Forum video collection is now available (HXr forum is coming soon).

8/27/2014- Mini-X manual revision A3.

Now available with information on HITS, Synthetic Approach, and other new features.

8/19/2014- New Mini software updates available including En-route Highway-In-The-Sky boxes and OAT and Density Altitude display. Also, Air Data Software v. 4.

7/23/2014- New Mini-X software update for remote magnetometer calibration.

7/9/2014- FDS Pathfinder Remote ADS-B Receiver Supplement published.

uAvionix EchoUAT

Find us on Facebook!

HorizonHXrHXr – The flagship of the GRT line, 8.4, 10.4” and 12” screens, featuring wide view, selectable insets that preserve your instrument scan, remote radio rack capable, and extensive interfacing. An excellent IFR solution. Android app compatible.

HorizonHXHX – The flagship of the GRT line in 6.5” and 8.4” screens, split screens, support for remote transponder, and extensive interfacing. An excellent IFR solution that requires less panel space than the HXr. Android app compatible.

Sport SXSport SX – The high value and high function EFIS, available in 6.5” and 8.4” screens.  Plenty of interfacing and using the same AHRS as the top-of-the-line HX/HXr, makes this an ideal choice for VFR and IFR panels.

Mini Mini – The 4.3” EFIS that works perfectly as an minimum cost primary EFIS, or as a backup. When used with other GRT EFIS systems, it provides automatic cross-checking of its attitude, flight plan sharing, and more. Includes full performance (no aiding required) AHRS.

AutopilotAutopilot Servos

Add to any GRT EFIS and most Mini EFIS, at any time, to fully automate your airplane. Smooth and accurate, as you would expect from GRT.

Engine Monitors

EIS Engine Monitors

Robust and inexpensive, these engine monitors have been proven in over 25,000 installations. They provide all the function you will ever need, and the reliability to match. Models for all engines, from two-stroke and four-strokes, to turboprops and jets...we have you covered.

Click here to view the EFIS lineup.

Sport EXNEW! Sport EX – The 7” Expandable EFIS. Starting at only $1500, it is suitable for light sport through serious IFR flying, according to how you choose to equip it. High-resolution 800x480 LCD with touch screen option.

Horizon EXNEW! Horizon EX – The 7” Display Unit with touch screen option. Drop-in Replacment for WS, or high-value display unit with any GRT EFIS.  High-resolution 800x480 LCD.