Kasper and Richter collaborated with the BRK Mountain Rescue Service and came up with the durable, precise Sherpa BW2 <em>Sighting</em> <em>Compass</em>. A lot of mirror-<em>sighting</em> <em>compasses</em> have adjustable declination and a triple <em>sighting</em> system, but the Sherpa BW2 <em>Sighting</em> <em>Compass</em> goes a few steps further with an unbreakable polished aluminum <em>sighting</em> mirror and a thermo-elastic, fluid-filled capsule. The Sherpa BW2 <em>Compass'</em> flexible capsule prevents bubbles that often occur with temperature changes and hairline cracks that