At first glance, it is difficult to tell the difference between the Sport SX, and our flagship, the Horizon HX. When equipped with the optional synthetic vision, the 10-mile vision range keeps you well aware of terrain, and generates 3-D way-points, obstacles and runways. Five serial ports and a USB port provide for connectivity with ADS-B, com and navigation radios, autopilots and much, much more. The Sport SX includes the new Adaptive AHRS technology, digital magnetometer and internal GPS, and starting price of only $2,600 makes this an unbeatable value for  VFR or light IFR airplanes.

Starting at only $2,600

6.5″ Sport SX single display package

View pricing and options


Your needs can change, but the Sport SX is ready for you. The starting price does not include synthetic vision, but the Sport SX includes a hi-speed processor that is synthetic vision ready. Optional vertical (lateral is included) autopilot/flight director functions can be added at any time without removing it from your airplane. Full interfacing to IFR GPS navigators, such as the G430/G650 is always available via the optional ARINC 429 module.


Here the PFD shows the way-point on the horizon.  The flight path marker shows the airplane in a slight descent (below the horizon water-line), tracking just the the right of the way point. The flight director has been set at a 1000 fpm decent to 1600 feet and is commanding the pilot to pitch down (nestle the yellow chevron within the magenta) and make a very slight right roll to achieve the descent and a 10 degree heading.  Winds are a left cross-wind at 12 mph.

Ten split-screen combinations are included, combining two or three views into one screen of the PFD, map and HSI, and engine monitoring. Information is clearly presented, making it practical to fly with a single screen and rarely touch a button. For dual screen installations the split-screens provide a single-screen reversionary mode suitable for IFR flight.

Dual-Screen Optimized

Dual screens were never an after-thought. The Sport SX was designed to function together, providing more information, interfacing and redundancy. Illustrated below are two screens configured for takeoff. We like displaying the EGT time history for takeoff. It allows for differentiating between engine problems affecting a single cylinder and those affecting the entire engine–potentially valuable data for making critical decisions!

Below are two Sports as they are configured after initial climb-out. The map now replaces the engine page, and the engine strip is shown on one of the screens. Either screen could show the engine strip. The PFD has the terrain mode turned on. Choosing the screen is one button push away.

VFR Friendly

Often the days we fly do not require constant monitoring of the airplanes attitude. Airspeed, altimeter and a map are all we need, with the PFD attitude to back us up if conditions change. We love those days and so does the Sport SX! That is why we allow you to show airspeed and altimeter tapes on your moving map. The Sport SX rounds everything out with wind and destination information.

The green arc shows where the airplane will be when it reaches a pre-selected altitude (ground level in this case). Extended centerlines make it easy to line up on the correct runway, and is essential at night.

 Obstacle Alerting

The greatest value of obstacle alerting occurs when you find yourself forced to fly under an overcast in less than desirable visibility. At times like this, it must be effortless to understand such threats. That is why we show your threats on the PFD and not just the map. We show you the threat in the exact place you will be looking–the PFD. They appear in the same location out the window as they appear on the screen. Simple, and potentially life saving.

Situational Awareness Without Synthetic Vision

Deferring synthetic vision does not mean you are sacrificing situational awareness. The Sport SX shows obstacles and runways on the screen as they appear out the window, even without the synthetic vision. The highway-in-the-sky guidance for the synthetic approach still delivers the sense of reality necessary to make any approach easier and more precise.

The Source of the Attitude

The integrity of an EFIS is dependent on the integrity of the attitude data that drives it. GRT Avionics has always lead the way with the only AHRS in the industry that can operate without airspeed or GPS aiding. Read more about the latest generation of AHRS here.

Comprehensive Engine Monitoring

Having produced the EIS engine monitor for over 20 years, we’ve accumulated a great deal of personal and customer engine monitoring experience. From this came such exclusive features as the exhaust gas temperature (EGT) time history. A simple graph of the last two minutes of all EGTs, our engine monitoring system makes it effortless to distinguish between engine problems affecting one cylinder, or the entire engine. This distinction could be essential when making decisions in response to engine problems, especially at critical times such as initial climb out. We find it so useful that we never takeoff without it displayed, and we recommend you don’t either.

CHT time history also proves useful by making the trend obvious. This is especially useful in high-performance airplanes, such as RV’s, Lancairs, and all pushers, where engine cooling can require some pilot technique to manage. It leaves no doubt which way temperatures are headed.

Finally, we love the specific fuel consumption display. Its measure of engine efficiency that confirms when you have leaned properly, and tells you when you need to lean again.

Engine Data with a Bonus

Engine data is provided to the SX via the Engine Information System (EIS). The EIS is a complete instrument with a display and user-interface. Models are available for practically every engine, from 2-strokes, 4-strokes, turboprops and turbines-we have instrumented it. The EIS may be remotely mounted, just like any data collection device, but it can also be mounted in the instrument panel as a primary or backup display of engine data. In tandem seating airplanes it can be used as an instrument for the rear seat. Engine limits can be set in the EIS and can be used to drive its own warning light, even when remotely mounted.

Simple Operation

Dual rotary knobs and 5 lighted softkeys make up the pilot interface. All are high tactile force, which is optimal for operation in turbulence. The bezel includes a hand rest that further enhances ease of use when things get rough. Primary knob functions are heading selection and baroset. Pressing any softkey brings up secondary knob functions and softkey labels. Simple, effective and efficient.

Turbulence Optimized

When on the ground or in calm air, practically any pilot interface will work. Introduce turbulence and the story changes. To operate an EFIS in such conditions, the pilot must be able to position his fingers on the control (knob or button) without activating it. Activation of the control can then take place with assurance the intended operation will be performed. This is why the Sport SX does not have a joystick type control. It has high-tactile force knobs and buttons and a ledge above the buttons to steady your hand. It’s proven, and it works.

The Connectivity You Need

Five serial ports in and out and a USB port allow for great flexibility within your panel design. An optional ARINC 429 interface can be added, while still retaining all serial ports, for connectivity with IFR GPS navigators, such as the G430/650/750.

Autopilot Ready

The Sport SX includes full autopilot functionality. Just add GRT servos and you are on your way to a fully automated cockpit. Like all GRT EFIS systems, it can also control an external stand-alone autopilot. Even without servos, all autopilot functions are available to drive the flight director, giving you a single cue to follow to control attitude and navigation, greatly improving accuracy while reducing workload. Read more here.

Already own an autopilot? Just wire it to the SX, and the system will couple it to all your navigation sources.

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

Angle-of-Attack (AOA) Sensing/Stall Warning

The GRT Avionics AOA function drives on-screen AOA symbology that shows too fast/too slow/optimal approach speeds, as well as stall warning. In addition, an audio output is providing an approaching stall warning annunciation (a pulsating tone that varies with proximity to the stall warning angle) and a solid tone indicating stall is imminent.

Sensing is via a two-port 45 degree pitot tube, such as those commonly available from a variety of manufacturers, or using a probe fashioned by the builder. This method has no moving parts, and allows the use of heated pitot tubes that preserve the stall warning function even in the presence of icing.

The GRT Avionics AOA function drives on-screen AOA symbology that shows too fast/too slow/optimal approach speeds, as well as stall warning.

In addition, an audio output is provided on the Sport SX display unit. This audio provides an approaching stall warning annunciation (a pulsating tone that varies with proximity to the stall warning angle) and a solid tone indicating stall is imminent.

Audio Alerting System

Voice alerts are provided for critical engine and flight conditions, as well as altitude call outs. System changes, such as autopilot disconnect and way-point passage, are also annunciated. Angle-of-attack audio utilizes an attention-getting beeping tone that increases in urgency as your approach stall. You can even use your own audio recordings for your alerts.

Free Database and Software Updates

Navigation database updates are provided free for all US territory. Software updates are also free. All GRT equipment includes bootloaders, allowing them to be updated via the SX without removing them from the airplane.

We support that!

We have always supported the spirit of experimental aircraft by providing the builder with as many options as possible. This is why we provide free  software support for the following equipment:

  • ADS-B (Traffic and Weather) including Radenna Skyradar, Dual XGPS170, iLevil
  • Multiple GPS Receivers (all types)
  • Garmin 400/500/600/700 Series Panel Mount GPS/Nav/Comm
  • RS-232 radios such as SL30/SL40
  • XM Satellite Weather
  • CO Guardian
  • TIS Traffic datalink (GTX330, Trig TT21/TT22)
  • Zaon Traffic
  • BF Goodrich WX-500 Stormscope
  • Vertical Power (All Models)
  • Tru-Track Autopilot
  • Trio Autopilot
  • TCAS systems

(If there is a device that you do not see on this list and you would like the SX to interface with it, drop us a line! We are always willing to consider new devices, and thanks to the extensive interfacing and powerful processor within the SX, future growth is built-in!)

Chose your screen size

The SX is available in 6.5” and 8.4” screens, with the 8.4” being the most popular. Both feature the sunlight-readable LED backlit screens. The compact design allows two 6.5” screens to be stacked in the typical panel, such as an RV. The 8.4” screens can be mounted side-by-side in front of the pilot. The SX also works great alone, or with with another SX, or Mini.

Easy Upgrade Path from Older Sport Systems

The Sport SX shares the same wiring as our previous Sport systems.

Pricing and Options Additional Screenshots Documentation