[skysurfer]

For looking up objects I use an electronic altimeter to set the altitude and an azimuth circle to set the azimuth. However, the latter must be calibrated every session. The altimeter is easy to calibrate once (with a bubble level) as the bubble level has a hard zero altitude value.

And the altimeter is accurate within 0.2 degrees, while a smartphone's inclinometer has an accuracy of only 2-3 degrees.

The azimuth can theoretically be achieved by a compass, but in all cases as far as I know the accuracy is not better than several degrees.

Is there a way to get the azimuth to an accuracy of less than 0.5 degree ?