The 19-F type is a newly designed and developed directional compass, which adopts the latest electronic and computer technology internally. It can directly input digital heading signals that comply with NMEA2.0 (IEC 61162-1) statements, convert and drive a dial similar to a mechanical compass to rotate and indicate the ship's heading in real time. At the same time, it has a digital display of heading. Therefore, this machine is directly applicable to various digital main compasses, such as ANSCHUTZ STD22, etc.