The Expedition range of Silva compasses are for serious navigators and professionals. Specially designed to allow for working on map. The base plates have different scales and a built-in magnifier. Naturally they are equipped with luminous points for navigation in the dark. The Expedition 4 features a full-size base plate and is used by different defense forces around the world. Features 1:25k, 1:50k, 1:40k, mm and inch map measuring scales. Marked in degrees. Also features red neck cord. Size: 125 mm (L) x 60 mm (W).