AHRS (Attitude and Heading Reference System) gives you pitch, roll, and heading data — enabling synthetic vision on your EFB.
With AHRS enabled, your EFB app can display: - Attitude indicator (artificial horizon) - Synthetic vision (3D terrain view) - Turn coordinator data
This turns your tablet into a backup attitude reference — useful for situational awareness and as a “steam gauge” backup.
The Stratux AHRS module contains: - Accelerometers — sense pitch and roll - Gyroscopes — sense rotation rates - Magnetometer — sense heading (compass)
These sensors work together to determine which way is “up” and which way you’re pointing, then stream that data to your EFB.
AHRS is optional. Basic Stratux functionality (traffic and weather) works without it.
Consider AHRS if you want: - Synthetic vision in ForeFlight, Avare, etc. - A backup attitude reference on your tablet - Complete situational awareness
If you only care about traffic and weather, you don’t need AHRS.
Stratux units can be upgraded with an AHRS chip. The upgrade includes: - MPU-9250 sensor module - Fan controller (AHRS module manages the cooling fan)
AHRS needs to know how Stratux is oriented in your aircraft:
You can mount Stratux differently and configure the orientation: 1. Go to http://192.168.10.1 → Settings 2. Set AHRS orientation to match your mounting 3. Calibrate by leveling the aircraft
ForeFlight supports Stratux AHRS, but requires a “Danger Zone” setting enabled.
Note: ForeFlight’s AHRS calibration is separate from Stratux’s. Follow ForeFlight’s in-app instructions.
AHRS is for situational awareness only. It’s not certified for IFR flight or primary attitude reference. Always maintain proficiency with your actual instruments.
Accuracy depends on: - Proper mounting orientation - Good calibration - Stable GPS position - Distance from magnetic interference
Having AHRS issues? See Troubleshooting AHRS or the detailed AHRS guide.