Angular velocity can be measured with a gyroscope in a formula called degrees per second or revolutions per second. These are measurements of the actual speed of the rotations. The speed actually denotes the angular rotation which is helpful in determining navigation and direction.
It is found in most all autonomous navigation systems that are used in space or in the air. It is a simple process, really, but can be a world of help. The units are measured and thus, the orientation is revealed. As one learns the prinicpals behind the gyroscope and its spinning, equations can be a godsend for navigation.
It is an amazing yet very simple discovery that was made centuries ago. Children are amazed when they begin to learn the scientific values behind the device and professionals continue to learn more about it too as time goes on. Much has to do with gravity which is amazing in itself.