The Expedition 4 is once again a high quality compass produced by Silva, it is specially designed to allow for working on map. With base plates for the more experienced navigator, Silva have created an all around compass ideal for any situation - and designed for use by the defence forces. Key Features: PLATE COMPASS: full-size base plate compass for experienced navigators USE: used by different defense forces around the world SCALE: 1:25k, 1:50k, 1:63.36k, mm and inch map measuring scales LUMINOUS POINTS: for navigation in the dark Please note compass has MILS not Degrees shown on main bezel (model shown is Silva 4 Compass)