Exail Quadrans IMO Grade Compass and Attitude Reference System
Exail Quadrans IMO Grade Compass and Attitude Reference System
Survey Equipment

Exail Quadrans IMO Grade Compass and Attitude Reference System


Quadrans is based on a unique iFOG design* which has been in use in the harshest environment for 15 years. From land application to space environment through all main European navies first ranks platforms. Quadrans has been in use for years in many navies (French, Chile, UK, Portugal,…) and multiple DP operators. In addition, Quadrans has also been the obvious choice for most competitors in the America’s cup and the Vendée Globe, proving its performances in any sea state and its reliability. Reliability and through life cost The return of experience on Exail iFOG technology shows a MTBF
of more than 150,000h, without any kind of maintenance (neither on board nor with factory return), and a life expectation that has already proven to be superior to 15 years. All this combined makes Quadrans a true install and forget equipment with an unbeaten low cost through the life of your ship. As a token of our confidence, Quadrans comes with a 5 years warranty.

The Quadrans solution, as every Exail product, is an opened architecture, ready to interface with any other component. It includes, in addition to standard NMEA, a large library of open source protocols, to give autonomy to the user in the integration of the Quadrans in the life of the ship.


Quadrans, is a fully strap down gyrocompass and attitude reference system. IMO and IMO-HSC certified, it provides all the necessary data for demanding navigation and control applications. High customizability and Ethernet/Serial connectivity provides a very easy integration on any platform. Based on a state-of-the-art interferometric Fiber-Optic Gyroscope technology (iFOG*), Quadrans does not require any maintenance during its unlimited service life. Quadrans is the ideal replacement for any mechanical gyro for whom is focused on total cost of ownership and maximizing availability and safety of their ships



  • Heading accuracy 0.15 deg secant latitude RMS (*)
  • Roll/Pitch accuracy 0.1 deg RMS
  • Settling time < 30mn (all conditions) , 0.7° in 15mn
  • ROT 0.01 deg / sec
  • Heave 10 cm / 10% whichever is higher

Physical Characteristics

  • Weight 2.8 kg
  • Dimensions (L x W x H) 160 x 160 x 113 mm 6
  • Connections Fisher connectors Cable glands

Operating range/Environment

  • Heading/Roll/Pitch 0 to +360 deg/±180 deg/±90 deg
  • Latitude +/- 85°
  • Max Rate 250°/s
  • Operating/Storage temperature -20°C to 55°C     /   -40°C to 80°C -20°C to 55°C
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