The Mk2020S Magnetic Compass is intended for commercial vessels over 150GRT, fishing vessels over 35m and naval vessels with or without DG correction. Suitable for use with Lilley & Gillie (and other) Transmitting Magnetic Compass (TMC) equipment to operate repeaters, off-course alarms and outputs to navigation equipment including gyro back up. Type approved to the European Marine Equipment Directive (MED), Chinese Classification Society and other Maritime Authorities.