GFC 190 Azimuth Circle Magnetic Compass Navigation Expert Orientation Calculation GFC Series Marine Magnetic Compass Azimuth Circle, Marine Navigation Specialist Azimuth Circles GFC-190 are used for magnetic compass CPT-190 or CPL-190. Marine Magnetic Compass Azimuth Circle : Compact structure. Wide application. Easy operation. Good performance. GFC Series Marine Magnetic Compass Azimuth Circle is used for […]