Silva 3nl is an all round compass for military and outdoor activities the easy to grip compass housing features a stable easy to read needle patented redblack north south lines in the capsule bottom ensure easy and safe settling the baseplate with curved up back end has a magnifying lens for precision map work together with stencil holes for star and control markings in the front the scale slide at the tip of the compass is detachable the included scale lanyard makes it easier to quickly