Military Compass by Cammenga. Built to the demanding specifications of U.S. fighting forces. Induction dampening means no liquid, no bubbles, and no leaking! Battle tested - shock, water, and sand proof. The CAMMENGA 27 Compass is depended on by the U.S. Military as well as the most extreme outdoor enthusiasts all over the world. The accuracy and quality of a Cammenga Compass saves time and saves lives. This is all of the 3H compass just lacks the tritium. This compass glows but needs a light source to recharge Proudly built in the USA.