Italian Military Style Compass with Clinometer The Compass has a rotatable dial for finding your bearing, with a magnification prism allowing you greater accuracy when setting North. The Compass face itself is also hinged on a central mount for greater accuracy on hilly terrain, and there is a level bubble next to the dial for additional accuracy. A Sighting Reticule on the glass sight on the lid allows for calculating both distance and the size of an object. The attached Clinometer allows for measuring gradient, with the help of the calculation table on the base of the Compass. These also come with an instruction booklet explaining how everything works, helping you to make full use of all the features.