Sonardyne - Delivering trusted solutions for acoustic positioning, inertial navigation, wireless communications, sonar imaging

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.
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.
| Feature | Type 8084 - Lodestar GyroCompatt 5 | Type 8084-3164 - Lodestar GyroCompatt 6 | ||
|---|---|---|---|---|
| Depth Rating | 3000 Metres | 3000 Metres | ||
| Opertaing Temperature | -5ºC to +40ºC | -5ºC to +40ºC | ||
| Operating Shock Rating | 22g, 11ms Half Sine | 22g, 11ms Half Sine | ||
| External Battery Pack / ROV Supply | 24V (18-50V) | 24V (18-50V) | ||
| Battery Life | Acoustic Navigation Standby | 2 Months | 2 Months | |
| Lodestar Permanently Powered On | 20 Hours | 20 Hours | ||
| Acoustic | Compatt | Operating Frequency | MF (19-33.5kHz) Sonardyne Wideband 1 | MF (19-33.5kHz) Sonardyne Wideband 2 |
| Transmit Source Level | 185-192db re 1uPa @ 1m (5 levels) | 185-192db re 1uPa @ 1m (5 levels) | ||
| Positioning Accuracy | +/- 5cm | +/- 5cm | ||
| Telemetry Protocol | Sonarydne SMS and Modem | Sonarydne SMS and Modem | ||
| Ranges Tracked | 14 simultaneous replies | 14 simultaneous replies | ||
| Lodestar AHRS | Heading | Range | 0-360° | 0-360° |
| Accuracy | 0.10° secant latitude rms | 0.10° secant latitude rms | ||
| Settle Time | ||||
| Follow Up Speed | 500º / second | 500º / second | ||
| Resolution | 0.01º | 0.01º | ||
| Roll & Pitch | Range | ±180º (No physical limit) | ±180º (No physical limit) | |
| Accuracy | 0.05º | 0.01º | ||
| Resolution | 0.01º | 0.01º | ||
| Heave | Range | ±99m | ±99m | |
| Accuracy (Real Time) | 5cm or 5% (Whichever the greater) | 5cm or 5% (Whichever the greater) | ||
| Bandwidth | User Selectable | User Selectable | ||
| Resolution | 0.01m | 0.01m | ||
| Digital Output | Output Telegram (e.g. For ROV LED display | Yes | Yes | |
| ROV Switch | Contact Closure | Yes | Yes | |
| Data Back-up | Data Logger | 8GB internal memory (expandable to 32GB) to allow post processing of mission data |
8GB internal memory (expandable to 32GB) to allow post processing of mission data |
|
| Options | Remote Transducer for ROV applications | Available | Available | |
| Sensors | Sound Speed Sensor | +/- 0.03 m/s | +/- 0.03 m/s | |
| Pressure (Strain Gauge or Paroscientific DigiQuartz) | 0.01% FS | 0.01% FS | ||
| Physical | Size (Dia x Length) | 250mm x 900.2mm | 250mm x 900.2mm | |
| Weight in Air/ Weight in Water | 42kg / 13.8kg | 42kg / 13.8kg | ||