Electronic Compass, with built-in GNSS/GPS Receiver

Electronic Compass, with built-in GNSS/GPS Receiver
Electronic Compass, with built-in GNSS/GPS Receiver

LT-1000 NRU

The LT-1000 Navigation Reference Unit (NRU) is a maritime heading sensor with built-in GNSS/GPS receiver from Lars Thrane A/S. The LT-1000 NRU is designed for the leisure as well as the professional maritime markets. The LT-1000 unit meets all standards and certification requirements needed for worldwide maritime navigation equipment.


The LT-1000 NRU is a small, compact, and very advanced unit with 12 precision sensors (magnetometers, gyros, accelerometers, barometer, thermometer, and GNSS/GPS receiver). With the use of sensor-fusion and Kalman filtering, the LT-1000 NRU outputs: true heading, roll, pitch, position, ground speed, course over ground, air pressure, and temperature in real-time, with high precision and resolution. The LT-1000 NRU includes advanced technologies such as :

  • Kalman filtering.
  • Calculation of magnetic variation based on the World Magnetic Model (WMM).
  • Compensation of soft and hard iron (deviation).
  • Built-in magnetometer calibration algorithm.
  • Receive and track multiple satellite systems (GPS, GPS & GLONASS, or GPS & BeiDou).
  • Support for Satellite-Based Augmentation System (SBAS): EGNOS, WAAS and MSAS.

The LT-1000 NRU makes use of the latest technology within GNSS/GPS receivers, with market leading acquisition and tracking performance.

The LT-1000 NRU is designed and built for the demanding and rough environment at sea and with an operational temperature range from -40⁰C to +55⁰C (-40⁰F to +131⁰F).


The LT-1000 Navigation Reference Unit is easy to mount on a 1” pole (optional installation: roof mount) with a single cable supporting NMEA 0183, NMEA 2000, and power. The built-in magnetometer calibration algorithm will quickly compensate for heading deviation, and the LT-1000 NRU will output reliable navigation data. An external PC installation and service software is available for optional configuration and maintenance of the LT-1000 NRU.

More than 40 years of experience have been put into the design and construction of the advanced LT-1000 NRU, with an exceptional performance and specification level.

LT 1000 NRU Heading Sensor
LT 1000 NRU Heading Sensor

Key Features :

  • Navigation Reference Unit with 12 precision sensors.
  • True heading, magnetic heading, deviation, variation, roll, pitch, UTC time and date, position, satellite information, ground speed, course over ground, air pressure and temperature.
  • 72-ch. GNSS (GPS/GLONASS/BeiDou) satellite receiver with SBAS corrHection.
  • Standard (figure 8-pattern) and Adaptive deviation calibration algorithm.
  • Simultaneously NMEA 0183 and NMEA 2000.
  • Configurable NMEA 0183 sentences (enable/disable, talker ID, output rate).
  • Easy configurable NMEA 2000 termination resistor (open or terminated).
  • Easy configurable NMEA 0183 data rate (4800 or 38400 baud).
  • Each unit is factory calibrated and functional tested over temperature prior to shipment.
  • Worldwide maritime certification.

Specifications :

  • Certification & standards: CE, IEC 60945, IEC 60950, EN 300440-2, FCC, IC, RCM, RoHS, NMEA 0183, NMEA 2000.
  • Dimensions, with pole mount: 151.4 x 81.65 x 128.0 mm (5.96 x 3.21 x 5.04 in.).
  • Weight, with pole mount: 240 g (0.53 lbs).
  • Temperature (ambient), operational: -40°C to +55°C (-40°F to +131°F).
  • Temperature (ambient), storage: -40°C to +85°C (-40°F to +185°F).
  • Waterproof: IP46 / Humidity: 95% non-condensing @ 40°C..
  • Communication Interface: 8-pin female connector for NMEA 0183, NMEA 2000 and power.
  • Input power: 9-40 VDC.
  • Power consumption: < 1W.
  • Load Equivalent Number (LEN) : 2.
  • Compass safe distance: 0.3 m (1 ft).

    LT 1000 NRU Heading Sensor
    LT 1000 NRU Heading Sensor

In The Box :

  • LT-1000 NRU.
  • Pole & Roof Mount.
  • 10m Cable Multi 8-pin Simple-Cut (M).
  • Screw-in Conn. NMEA 2000 Micro-C (M).
  • Quick Installation Guide.
  • Safety Instructions Sheet.
  • Unit Test Sheet.

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