The NAVITWIN IV displays and monitors a minimum of one and a maximum of four heading sources (three gyro compass headings and one magnetic heading) from the Northrop Grumman Sperry Marine range of heading sensors:

  • NAVIGAT 3000  Fiber-Optic Gyrocompass and Attitude Reference System
  • NAVIGAT X MK 1 Digital Gyrocompass
  • NAVIGAT X MK 2 Digital Gyrocompass*


Standard Features:

  • Monitors and controls all heading sources of a multi-compass heading reference system
  • Automatic acceptance of set heading input from an autopilot or a manual input
  • Reads the sine / cosine analogue signals from a Northrop Grumman Sperry Marine magnetic compass flux gate and converts these into magnetic heading data in National marine electronics association (NMEA) format
  • Automatic correction for magnetic variation and deviation
  • Serial dimmer input from a  central dimmer control
  • True heading and status protocol (THS)
  • Selectable display colours


For more information about Northrop Grumman Sperry Marine’s NAVITWIN IV Heading Management System, please contact us.


* Only in combination with one magnetic heading source. NAVIGAT X MK2 is not designed to be used in dual and triple gyrocompass configurations.