(For the Bézard compass History, click here!)

The most evolved model, aimed at ambitious hikers and soldiers, was the Bézard-Universal kompass (BUK). The sighting slits had two transversal wires at mid-height thus forming two reticules. Using these, with the spirit level and the pendular clinometer incorporated in the lid, one could take fairly accurate bearings in three dimensions ( Courtesy compassmuseum.com)