Overview

The Lodestar GyroCompatt (LGC) integrates Sonardyne’s Wideband® acoustic positioning and Lodestar Attitude and Hearing Reference Technology (in one small, highly versatile and robust instrument. This provides high update rate wireless attitude, heading, heave, surge, sway, pressure, SV and acoustic positioning of any subsea object.

Two versions of Lodestar GyroCompatt are now available; Lodestar GyroCompatt 5 is compatibale with Sonardyne's 5th generation Long BaseLine technology such as the Compatt 5 subsea transponder. Lauched in March 2010, Lodestar GyroCompatt 6 is compatble with Sonardyne's new 6G (Sixth Generation) technology platform which uses the latest Wideband 2 signal architecture.

Compatible with USBL and LBL positioning systems, the Lodestar GyroCompatt product family provides real time motion data for structure deployment via the integrated high speed acoustic modem.

The internal high capacity rechargeable battery pack enables quick charge times and up to 20 hours of continuous operation with the ability to turn the gyro on and off to save battery life giving over two months of transponder life. The instrument is small and light enough to be ROV installed and a mechanical stab enables precision alignment to any structure.

Applications

Structure position and orientation can be accurately determined during lowering, set-down and as-built surveys. Using the Lodestar GyroCompatt 6 for metrology delivers the measurements required for pipe-end coupling.

The stab, gyro and transducer are pre-aligned and this speeds up spot measurements as only single observations are required.

Autonomous logging negates the need for a vessel and ROV to be on standby taking measurement during long term settlement observations.

Modular construction allows for upgrade and service access to the transponder module.

 

Features & Benefits

Sonardyne Wideband® acoustic positioning transponder and Lodestar AHRS unit in a single subsea housing

Rechargeable 20 hour internal battery pack; option for external power

Acoustic and manual ROV On/Off switch for Lodestar AHRS

Upgradable to LBL aided INS

Sonardyne Wideband® and Kongsberg HPR 400 compatible

Autonomous data logging mode (sensor data and ranges)

Faster command and configuration

Simultaneous ranging and sensor data recovery in one transmission

Integrated sound speed and pressure sensor with an additional port for auxiliary sensors

Real time diagnostics on range measurements for quality control

High speed acoustic modem

Compact size for ease of handling and ROV deployment/recovery

Data telegram output and 24V available for ROV displays

Lodestar IMO certified

Technical Specifications