Maritime Systems

Precision positioning for ship navigation

A stable heading and position reference for naval platforms and surveillance vessels, from a fibre-optic gyro INS or a GNSS receiver.

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The challenge

A vessel in open water needs a heading and a position it can trust, all the time, for navigation and for the systems on board.

Satellite signals are not always there. When GNSS drops out, the ship still needs to know where it is and which way it is pointing.

How we solve it

Two ways to do it. Aldebaran is a fibre-optic gyro INS with GNSS built in, for positioning and pointing when GNSS cannot be relied on. Where GNSS alone is enough, the Deneb GN404 receiver is qualified to land and marine military specifications.

Aldebaran: holds on through GNSS outages
Closed-loop fibre-optic gyros with 0.1 °/hr bias instability keep the solution going on inertial data alone through short GNSS outages.
Aldebaran: heading and attitude
Heading to 0.3° RMS with GNSS in dynamic conditions, or 0.5° RMS with a calibrated magnetometer. Roll and pitch to ±0.05° (2σ) static.
Aldebaran: precise position
Under 0.8 cm horizontal with RTK, 1 m with SBAS and 1.5 m with GNSS, from a built-in L1/L2/L5 multi-constellation receiver with NavIC.
Aldebaran: works with the ship's systems
Takes position, speed and heading aiding from a master or external reference system. Outputs at 100 Hz over RS232 and RS422 in NMEA or binary, with 1PPS.
Deneb GN404: GNSS only
A multi-frequency GNSS receiver qualified to land and marine military specifications. 1 cm CEP with RTK, 1.5 m CEP standalone, NMEA 0183 over isolated RS232, RS422 and Ethernet, and 1PPS accurate to 20 ns.