Today we'll be taking a look at the Optronics Zero-Spin Marine Compass part number CP-201. Always know where you are, where you've been and where you're headed with the Optronics Zero-Spin Marine Compass. It's perfect for determining your heading when going out or coming back to port. The zero spin technology studies the dial for the easiest read among all Optronics compasses. The hash marks are… see more >