The Silva Expedition 4 is an advanced level compass designed for rescue workers and outdoor enthusiasts who demand top-tier equipment. This full-size base plate compass is perfect for experienced navigators on demanding trips or those who utilize advanced and precise navigation techniques. It withstands tough weather conditions and is constructed from robust material. Key features include GPS functionality, a magnifying lens for detailed map reading, a declination scale inside the capsule, and a detachable lanyard. The compass also boasts luminous markings for night navigation and map measuring scales for 1:25k, 1:40k, 1:50k, mm, and inches. It is used by various defense forces globally and is counterbalanced for Northern Hemisphere use (MN).