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Garmin GHA 15 Height Advisor Module for G3X Experimental

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Part# 10-07524
MFR Model# 010-02942-00


The GHA 15 height advisor offers above-ground-level (AGL) altitude reference at a cost-effective price. It brings radar-based accuracy, aural callouts and visual height indication to pilots of experimental and light sport aircraft equipped with Garmin G3X Touch™ Experimental displays.

Digital Height Advisories: Like other radar-based systems, the GHA 15 height advisor works by transmitting radio waves downward from your aircraft. When the signal is reflected from the surface, the system determines the precise height by using the time delay it takes to receive the signals back.

An All-In-One Module: The compact GHA 15 module is slightly larger than a deck of cards and weighs less than a pound (0.45 kg). The antenna and radar transceiver are built in to the unit, making for easy installation on the underside of you aircraft.

Digital Display Options: The GHA 15 module is compatible with the G3X Touch flight displays to provide visual height advisory readouts.

Audible Height Callouts: Starting at 300 AGL, pilots who have the GHA 15 audio outputs connected will hear altitude callouts at select intervals down to 1 above the surface. These callouts are user-configurable as to how long the prompts go.

Advance Processing: The GHA 15 height advisor can intelligently process hundreds of altitude measurements per second and apply advance digital filters to maintain an accurate continuous reading of your AGL Altitude.

Peace-of-Mind Technology: An affordable solution for experimental and light sport aircraft, the GHA 15 height advisor leverages proprietary Garmin signal processing technology to provide a smooth-tracking AGL altitude reference, even in challenging terrain environments.
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  • See digital AGL advisory readings from 500’ to touchdown1 on select flight displays.
  • Audio callouts provide landing cues in select intervals from 300’ down to 1’ AGL2.
  • Get accurate radar-based height readings over land or water.
  • Small and lightweight, the unit is 100% self-contained for easy mounting on your aircraft.
  • Audio outputs work with any standard audio panel.
  • Fly with precise AGL reference, especially in areas where current baro altimeter settings aren’t available.


  • Height: 4.35" (110.5 mm)
  • Width: 3.55" (90.2 mm)
  • Depth (from surface of fuselage): 1.02" (25.9 mm)
  • Depth (with connector): 2.47" (62.7 mm)
  • Weight: 0.5 lb (0.23 kg) max
  • Connector kit weight: 0.15 lbs (0.06 kg) max
  • Operational Temperature Range: -45C to +70C
  • Altitude Range: 25,000 ft maximum
  • Performance Specifications
  • Altitude Accuracy: +/- 1.5 ft (3-100 ft AGL), +/- 2% (>100 - 500 ft AGL)
  • Altitude Range: 0 - 500 ft AGL
  • Horizontal Velocity: 0 - 100 knots maximum
  • Vertical Velocity: 20 ft/sec maximum (up to 100 ft AGL), 25 ft/sec maximum (above 100ft AGL)
  • Pitch Angle: +/- 20° maximum
  • Roll Angle: +/- 20° maximum
  • Supply Voltage: 14/28VDC
  • Power Consumption: 5W maximum



Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: I would buy this GHA 15, if it is possible to connect it with a certified G3A touch. Is that possible?

The GHA 15 is currently being sold exclusively for experimental aircraft installations.

Q: What is the minimum height that the GHA 15 radar can determine? What is the measurement error up to 10 feet?

Altitude Accuracy: +/- 1.5 ft (3-100 ft AGL), +/- 2% (>100 - 500 ft AGL)

Altitude Range: 0 - 500 ft AGL

Q: Does this Garmin GHA 15 come with the mounting and attachment kit?

Yes. It does come with mounting hardware and a connector kit.

Q: Can this GHA 15 interface with a stand alone G5?

No the GHA requires the G3X Touch system.

Q: Can this Garmin GHA 15 interface with Garmin AERA 760 and G5?

No, this is a non FAA PMA approved item and only works with the G3X.