The Coghlan’s Liquid Filled Lensatic Compass is liquid filled for fast readability and has a jewelled pivot. The sturdy casing of the Coghlan’s Liquid Filled Lensatic Compass is made of hard plastic with a Slot and Wire sight to assist you in calculating azimuth and degree scale. You can use this Coghlan’s Liquid Filled Lensatic Compass for simple direction finding or in conjunction with a map to find your position in any given area in relation to landmarks. The Coghlan’s Liquid Filled Lensatic Compass is 2.25in in diameter and weighs just under 3oz. Complete instructions on how to use the Coghlan’s Liquid Filled Lensatic Compass are included.