Sonardyne Lodestar GyroUSBL

Gyro USBL combines a Sonardyne 6th (6G®) generation High Precision Acoustic Positioning (HPT) USBL transceiver and a Lodestar Attitude and Heading Reference System (AHRS) in the same pressure rated mechanical assembly capable of operating at ranges of 7000 m


With the AHRS in fixed mechanical alignment to the USBL’s pressure balanced acoustic array, the Gyro USBL can be quickly deployed without need for a calibration to determine the alignment of the ship’s motion sensors to the acoustic transceiver. For many applications, this can enable significant savings time and operational costs.

Manufactured in Aluminium-Bronze the Gyro USBL is ideally suited for short term temporary installations on vessels of opportunity using through-hull or over-the-side poles. It is also ideal for permanent installation on flexible stem tubes.


Technical information

Feature Type 8084-000-0445 Gyro USBL Type 8084-000-0447 Gyro USBL
Operating Frequency MF (19–34 kHz) MF (19–34 kHz)
Operating Range
Acoustic CoverageRange Precision
Positioning Repeatability
Up to 7,000 m
Up to ±90ºBetter than 15 mm
All transceivers tested to better than 0.1% of slant range 1 Drms
Up to 7,000 m
Up to ±90º optimised for deep water (depending on frequency of operation)
Better than 15 mm
All transceivers tested to better than 0.07% of slant range 1 Drms
Transmit Source Level SL = dB 1 µPa @ 1 m
Tone Energy Equivalent (TEE)*
200 dB
206 dB
200 dB
206 dB
Attitude Heading Range 0–360° 0–360°
Accuracy 0.04 to 0.1° secant lattitude 0.04 to 0.1° secant lattitude
Settle Time <5 Minutes <5 Minutes
Follow-up Speed 500°/second 500°/second
Resolution 0.01° 0.01°
Roll & Pitch Range ±180° (no physical limit) ±180° (no physical limit)
Accuracy 0.01° 0.01°
Resolution 0.01° 0.01°
Heave Range ±99 m ±99 m
Accuracy (Real Time) 5 cm or 5% (whichever the greater) 5 cm or 5% (whichever the greater)
>Resolution 0.01 m 0.01 m
Electrical +48 V dc Max 160 W +48 V dc Max 160 W
Communication RS485, baud rate switchable
Ethernet 100 Mbp
RS485, Baud Rate Switchable
Ethernet 100 Mbps
Operating Temperature -5 to 40°C -5 to 40°C
Storage Temperature -20 to 45°C -20 to 45°C
Dimensions; Length x Diameter 564 x 225 mm 578 x 310 mm
Weight in Air/Water** 51/28.5 kg 64/38 kg
Options Tilted array adaptor Tilted array adaptor



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