Silva Polaris Base Plate Compass

The Silva Polaris Base Plate compass is an instrument for the advanced orienteer as well as novices to map-and-compass work. Clear base plate with inch, millimeter and 1:24,000 scales, makes it easy to read a map, set bearings, and plan a trip. Features 2deg graduation lines with large numerals at every 20deg for easy reading of bearings. Red and black orientation lines facilitate establishing your position on, or setting your course from, a map; scales help determine distances. Large sighting arrow helps you set your course across the land; large bezel and ergonomic design make it easy to hold and use. Fixed declination scale accomodates quick adjustments of map bearings to field headings. Base plate lanyard hole lets you keep the compass handy around your neck (lanyard not included). Friction-free sapphire bearing allows the tungsten steel needle to swing freely; permanently clear fluid keeps it steady. Instructions explain how to find yourself on a map given known landmarks and how to set a bearing across the land using a map.