Sonardyne UK (Head Office) T. +44 (0) 1252 872288 F. +44 (0) 1252 876100 E. [email protected] www.sonardyne.com Datasheet Lodestar 300 Subsea AHRS / SPRINT 300 Subsea AAINS Description Lodestar 300 is a combined solid state Attitude and Heading Reference System (AHRS) and optional 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 are also the standard for commercial aviation with a proven 15+ year track record. Lodestar AHRS requires no external aiding and can settle in <15 minutes or less in dynamic conditions. SPRINT INS adds advanced Aided Inertial Navigation that runs concurrently with the Lodestar AHRS algorithm. This dual algorithm capability is unique in the market and allows for dual use from one inertial instrument, e.g. Lodestar AHRS for ROV, SPRINT INS for Survey. On-board data storage and backup battery functionality ensures continued operation and no data-loss even if communications or external power is lost. SPRINT INS interfaces to aiding sensors such as USBL, a DVL, pressure sensor and sound speed. Power-pass through to aiding sensors is supported to ease integration. SPRINT INS can be operated without external time synchronisation and aided with manual positions and DVL for relative navigation. Lodestar and SPRINT have a proven track record spanning 10 years in the field in diverse applications from vehicle gyrocompass to demanding applications such as ROV guidance and mid water station keeping. The instrument is available in 4,000 and 6,000 metre depth ratings and is one of the smallest form factor subsea inertial instruments available. Applications Include • ROV gyrocompass • Vehicle guidance • Station keep and autopilot including mid water applications • USBL aided INS survey • DVL aided relative navigation Key Features • Single box solution for motion sensor, gyrocompass and AAINS • SPRINT provides concurrent AHRS and AAINS capability for dual use • 0.2º (AHRS) to <0.1º (INS) secant latitude heading accuracy • 0.1º (AHRS) to <0.05% (INS) roll and pitch accuracy • <15 minute settling time • Fast follow up speed of 900º/sec** • MTBF inertial sensors (RLG and Accelerometer) > 400,000 hours • Choice of depth ratings: 4,000 and 6,000 metres • Choice of connecters: Seacon (standard) or Seanet® (for use with FMC Schilling Robotics ROV) • Transport approved rechargeable liion battery back-up as standard • Minimum internal memory of 8 GB allows post processing and remote diagnostics • Ethernet interface • Lodestar AHRS can be remotely upgraded to SPRINT INS Sonardyne UK (Head Office) T. +44 (0) 1252 872288 F. +44 (0) 1252 876100 E. [email protected] www.sonardyne.com Specifications Lodestar 300 Subsea AHRS / SPRINT 300 Subsea AAINS Feature Depth Rating Physical Performance Size Weight in Air / Water* Mechanical Construction Connectors Heading Type 8084-000-4511 Type 8084-000-4571 4,000 metres 205 mm Dia. x 260 mm 18.5 kg / 11.5 kg Titanium 4 x Seacon (8084-4511) 1 x Seacon (8084-4571) Accuracy (Secant Latitude) Settle Time Roll and Pitch Follow Up Speed Accuracy Type 8084-000-9909 Type 8084-000-6511 Type 8084-000-9910 Type 8084-000-6571 4,000 metres 6,000 metres 205 mm Dia. x 250 mm 205 mm Dia. x 280 mm 18.5 kg / 11.5 kg 22 kg / 14 kg Titanium Titanium 4 x Seanet® (8084-9909) 4 x Seacon (8084-6511) 1 x Seanet® (8084-9910) 1 x Seacon (8084-6571) 0.2º (Lodestar AHRS) <0.1º (SPRINT INS) <15 minutes in dynamic conditions (Lodestar AHRS) Instantaneous (SPRINT INS) 900º / second** 0.1º (Lodestar AHRS) <0.05 º (SPRINT INS) Maximum Acceleration SPRINT Aided INS Upgrades Environmental Power Data / Comms. 10.0 g** Aiding Supported USBL, Depth, DVL, Zero Velocity, Manual Position USBL Aided 2 times improvement in precision over ‘raw’ USBL USBL and DVL Aided 3-6 times improvement in precision over ‘raw’ USBL DVL Aided Accuracy 0.25% position error for distance travelled Lodestar 300 AHRS can be remotely upgraded to SPRINT 300 INS Operating Temperature -20°C to +55°C Storage Temperature -20°C to +60°C Shock Rating 22 g, 11 ms half sine Power Requirement 24 / 48 V DC, 15 W nominal, 35 W max Back Up Battery Type / Life Li-ion / 5 minutes Data Storage 8 GB internal memory Digital Ports/Protocol up to 4 Digital Ports / RS232 or RS485 Other Ports 1 × Ethernet, 4 Triggers Output Rate Up to 100 Hz Output Telegrams Industry standard AHRS/INS telegrams including acceleration and rotation rates *Estimated Weights **Specific outputs such as acceleration and rotation rates may be limited below quoted performance for reasons of export classification and control Specifications subject to change without notice - 01/2016