CPL-190vertical Magnetic Compass is a sort of class A transparent liquid magnetic compass. It is designed and manufactured in accordance with the national standard GB/T 14108-93 (General Technical Terms of Marine Magnetic Compass Class A). The magnetic compass is suitable for the large and middle vessels acting as standard compass or steering compass and is used for measuring azimuth and indicating course heading. The product has the advantages of high precision 、convenient correcting difference 、steady performance and legible lighting etc.