Lodestar-Nav 200 provides all-in-one navigation for subsea vehicles and survey operations by combining solid state Attitude Heading Reference System (AHRS), a Syrinx Doppler Velocity Log (DVL) and a high accuracy pressure sensor in a single housing. The Lodestar-Nav is upgradable to SPRINT-Nav Acoustically Aided Inertial Navigation System [AAINS].
Lodestar-Nav 200 – AHRS and DVL
What you need to know
- Ideally suited for Station-Keeping applications
- Provides AHRS and DVL output capability
- Fully water blocked DVL endcap protecting internal electronics
- Small form factor; easy to mount
- 4,000 and 6,000 metre options
- Easy to export
More about this product
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.
It is also fitted with a Syrinx DVL that provides a large altitude range and high precision at all altitudes; this combines the best of 300 and 1200 kHz DVLs.
All onboard sensors are optimally integrated to provide seamless operation and unprecedented levels of performance compared with standalone instruments from different vendors.
The unit requires no calibration for all but the most demanding applications with ultra-tight mechanical alignment.
The Lodestar 200 AHRS provides heading, pitch, roll accuracy and settle time that is class leading in the low-cost north seeking subsea AHRS category. It requires no external aiding and can settle in <15 minutes or less in dynamic conditions.
Syrinx DVL utilises both Doppler and Correlation technology to gain performance advantages in environments where each technology is best suited. Each DVL transducer is fitted with a full depth rated water block to ensure protection of the internal components.
Lodestar-Nav can be interfaced via a single connection and/or the DVL can be interfaced separately depending on requirements. Continuous on-board data storage supports post-mission diagnostics and post-processing.
Lodestar-Nav 200 Specification
|Features||Lodestar-Nav 200 (4,000)||Lodestar-Nav 200 (6,000)|
|Depth Rating||4,000 metres||6,000 metres|
|Size (Diameter x Length)||Ø240 x 395 mm||Ø240 x 405 mm|
|Weight in Air/Water*||23.9/13.1 kg||28.1/17.2 kg|
|Connectors||2 x Seacon (MING-7-FCR)/2 x Seacon (MINL-16-FCL/L)|
|AHRS||AHRS Heading Accuracy
|AHRS/INS Roll and Pitch Accuracy||0.01º|
|AHRS/INS Settle Time||<10 minutes in dynamic conditions (AHRS)|
|DVL||DVL Bottom Velocity||±0.22 cm/s|
|DVL Min/Max Altitude||0.4/175 m|
|DVL Long Term Accuracy||±0.12% ±0.1 cm/s|
|DVL Velocity Range||>10 m/s|
|Minimum/Maximum Altitude||0.4/175 m|
|Velocity Resolution||0.01 cm/s|
|Pressure Sensor||0.01% FS removable module|
|Lodestar-Nav 200 AHRS can be remotely upgraded to SPRINT-Nav 300 INS|
|Onboard Data Storage||AHRS 8 GB/ DVL 32 GB|
|Digital Ports/Protocol||up to 4 digital ports/RS232 or RS485|
|Other Ports||2 x Ethernet, 4 Triggers|
|Output Rate||Up to 100 Hz (AHRS), Up to 25 Hz (DVL), Up to 15 Hz (pressure)|
|Output Telegrams||Industry standard AHRS/DVL/pressure telegrams including acceleration/rotation rates and temperature**|
|Operating Temperature||-5 to 50°C|
|Storage Temperature||-25 to 55°C|
|Shock Rating||22 g, 11 ms half sine|
|Power Requirement||20–50 V dc, 27 W nominal, 63 W max|
|Power Pass Through||2 x for external aiding sensors (up to 3A per sensor)|
|INS Battery Type/Life||Li-ion/5 minutes|
**Specific outputs may be limited below quoted performance for reasons of export classification and control and should not be used as IMU data.
To request a manual simply tick the box next to the manual you require and then press the Request Form button. You will then be able to request addition manuals for other products and your request will be emailed to our Customer Support Team who will reply to your enquiry. Alternatively please contact your local office who will be more than happy to help.
|Lodestar-Nav User Manual|