Reply To: Practice sights for a beginner.

[Jason]

Get the phone app “GPS anti-spoof” You set a few things about your setup, such as object, limb, horizon, dip, even index correction. It then tells you, in real time, the altitude of the body from your current GPS location. You can use a natural horizon, a bubble level, or an artificial horizon.

The app is designed to allow a person to detect anomalies in the GPS system, but is also a great tool for a quick practice.