Good protection against hard knocks: the smooth finish feels soft in your hand and will not slip even if it is wet. No parallax error: a prism projects the reading of the bearing to infinity. This also contributes to a more comfortable operation, as you do not need to alternate close-reading to read the card and infinite-reading to take bearings. Optimum conditions to take bearings: due to the superb card stability and the wide 20˙ field of view, which will accommodate the roughest sea conditions. Most accurate bearing: the pivot and very hard stone are a guarantee of long life and shock resistance of your compass. Soft bottom cell: engineered using ultra-sonic welding, it acts like an expansion diaphragm, preventing the formulation of bubbles and leaks. Course reading from above the compass - you can read your compass like a standard compass, with no need to look through the prism. Built-in photoluminescent lighting: completely maintenance free, impervious to corrision, operates without batteries or radio active tritium! Outstanding legibility of the card, with one degree graduations.