Above is a matrix of the Honeywell compassing solutions. Each of these compass solutions solve for magnetic heading by measuring the Earth’s horizontal magnetic field. By keeping the two-axis modules approximately level, maximum heading accuracy is achieved. For applications where compass modules will not be level, a 3-Axis tilt compensated compassing solution is recommended. These 3-Axis compass modules perform an “electronic gimbaling” function by adding the third magnetic axis and a tilt sensor for a gravity vector reference.