Sonardyne Lodestar AA INS

Lodestar is a solid state Attitude and Heading Reference System (AHRS) and Acoustically Aided Inertial Navigation System [AAINS]. The unit is comprised of 3 high grade, high reliability, commercially available, Ring Laser Gyros (RLG) and 3 accelerometers. A Sonardyne developed gyrocompass algorithm runs in the background even when used as an AAINS.


  • Single box solution for motion sensor, gyrocompass and AAINS
  • 0.04 to 0.1º secant latitude heading accuracy (gyrocompassing)
  • 0.01º roll and pitch accuracy
  • <5 minute settling time
  • 5cm / 5% heave accuracy
  • Fast follow up speed of 500º / sec
  • MTBF inertial sensors (RLG and Accelerometer) > 400,000 hours
  • Choice of depth ratings: 1,000, 3,000 and 5,000 metres
  • Surface version available
  • Transport approved rechargeable Li-ion battery back up as standard
  • Minimum internal memory of 8 GB (expandable to 32 GB) allows post processing of a 2 day mission
  • Ethernet interface
  • AAINS capability



Name: *
Company: *
Country: *
Email: *
Enquiried product/product type: *