Lodestar is a gyrocompass and motion sensor consisting of a combined solid state Attitude and Heading Reference System (AHRS), which is upgradable to SPRINT Acoustically Aided Inertial Navigation System [AAINS].  The unit is comprised of three high grade, high reliability, commercially available, Ring Laser Gyros (RLG) and accelerometers. The sensors used are the standard for commercial aviation with a proven 15+ year track record and MTBF of 400,000 hours+.

Lodestar Gyrocompass and Motion Sensor supports serial, Ethernet and industry standard telegrams for easier interfacing. In addition, advanced outputs such as acceleration and rotation rates are also available. On-board data storage and backup battery functionality ensures continued operation and no data-loss even if communications or external power is lost.

The instrument is available in 4,000 m and 6,000 m depth ratings. The latest third generation is one of the smallest form factor subsea inertial instruments available.

Lodestar AHRS has built-in field upgradability to the higher performance SPRINT INS. This feature allows operators to equip their vehicles with a cost effective AHRS whilst ensuring commercial and operational flexibility to upgrade as and when needed in the field.  The optional SPRINT upgrade provides a dual algorithm capability, which is unique in the market and allows for dual use from one inertial instrument, e.g. Lodestar AHRS for ROV, SPRINT INS for Survey teams.