The Plastimo Iris 50 is regularly praised by technical press and prestigious skippers alike, as the most reliable, sturdy and handy handbearing compass. • Two functions : handbearing and traditional compass. • Graduation : every 1°. • Field of view : 20°. • Clearance : ±12°. • Built-in photoluminescent lighting. • Red lubber lines. • Weight : 105 g.Outstanding legibility of the card, with one-degree graduations. 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, thanks 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 formation of bubbles and leaks. Built-in photoluminescent lighting, completely maintenance-free, impervious to corrosion, operates without batteries or radio-active tritium.Course reading from above the compass : you can read your compass like a standard compass, with no need to look through the prism. Good protection against hard knocks : the smooth finish feels soft in your hand, and it will not slip, even if it is wet.