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Gyro Compatt 6+

LBL transponder with integrated gyro

Engineered for: Structure

Gyro Compatt 6+ is our combined LBL transponder and AHRS, supporting every stage of your structure installation project. The instrument provides wireless high update rates of attitude, heading, heave, surge, sway, temperature, pressure, SV and acoustic positioning of any subsea object. Deep water structure installation - made easy.

At a glance

Combined LBL transponder and Lodestar AHRS instrument; rugged, ROV deployable design

Calculates motion and position of any subsea object; use it for structure installation and metrology

Rechargeable internal battery provides more than a day of continuous use

Wideband 3 inside; our latest signal protocols delivering fast, efficient operations

LBL and USBL modes; optimised for Fusion 2 and Ranger 2

Built to support subsea construction

Want to know more?

Heading accuracy 0.04 to 0.1º Secant latitude

Real time diagnostics on range measurements for quality control

Integrated Lodestar AHRS, factory aligned

Rechargeable 28 hr internal battery pack

Why Gyro Compatt 6+ is perfect for your operations

Wideband 3

For the first time, sensor telemetry data (e.g. pressure, depth, temperature) is embedded within ranging data so no more waiting for sensor readings at vital moments.


Gyro Compatt 6+ transponders are backwards compatible with your existing Compatt 6 inventories so you can mix and match in the field.

Long life

With a battery life of 28 hours, you have a full day to install your structure and recover the unit using ROV. Recharge it and it's ready to go again.


Gyro Compatt 6+ replaces the need to use a separate LBL positioning transponder and subsea gyro to support offshore construction campaigns. Using it, structure position and orientation can be accurately determined during lowering, set-down and as-built surveys, while for metrology, the instrument delivers the measurements required for pipe-end coupling.

By eliminating the cost and complexity associated with separate instruments, connected by vulnerable subsea cables and external battery packs, Gyro Compatt 6+ delivers significant operational benefits, saving vessel time and de-risking complex, deep water construction projects.

This, our third generation Gyro Compatt, shares the same field-proven mechanical design as previous models so there’s no need to adapt your existing survey tooling. It’s small and light enough to be installed by ROV, and a mechanical stab plate enables users to precisely align the unit to structures such as templates and manifolds.

It’s on the inside where Gyro Compatt 6+ differs from previous models. It operates using our exclusive Wideband 3 signal protocols so now, for the first time, sensor telemetry data (e.g. pressure, depth, temperature) can be embedded within navigation (ranging) telemetry data.

Using Gyro Compatt 6+ makes pauses in tracking to get sensor reading updates at vital moments a thing of the past.

Fusion 2 LBL software is the key to unlocking the benefits of Wideband 3. Only operations controlled with Fusion 2 can support Wideband 3 telemetry commands. Gyro Compatt 6+ transponders are backwards compatible with your existing Compatt 6 inventories. However, to achieve its full potential, you’ll need to use exclusively 6+ transponder arrays and Fusion 2.

Compatt 6+ Plus are available to purchase from Sonardyne, or hire from leading offshore equipment rental companies.

Why invest


  • Heading accuracy 0.04 to 0.1º Secant latitude

  • Ranging precision better than 15mm

  • Rechargeable 28 hr internal battery pack

  • Simultaneous ranging and sensor data telemetry; requires Fusion 2

  • Real time diagnostics on range measurements for quality control

  • Autonomous data logging mode

Acoustic, AHRS and Sensors

  • MF frequency (19–34 kHz)

  • Supports Wideband 3 and Wideband 2 telemetry protocols

  • Integrated Sonardyne Lodestar AHRS, factory aligned

  • Integrated SV and depth sensors


  • Dimensions 918 x 248 mm

  • 45/17 kg weight in water/air

  • Deploy and recover using ROV

  • External AHRS On/Off switch

  • Plastic, super duplex stainless steel and anodised aluminium construction. ROHS compliant


  • What’s in the box: Gyro Compatt 6+, manual

  • Warranty: 1 year return to Sonardyne service centre

  • ITAR Controlled: No

  • UK Export License: required; US Export License: covered under de minimis


Feature Type 8084
Depth Rating 3,000 m
Operating Temperature -5 to +40°C
Storage Temperature -20 to +55°C
Operational Shock Rating 22 g, 11 ms half sine
External Battery Pack / ROV Supply 24 V (20–50 V)
Battery Life Acoustic Navigation Standby 3 months
Lodestar Permanently Powered On 28 hours
Acoustic Compatt 6+ Operating Frequency MF (20–34 kHz) Sonardyne Wideband 3
Transmit Source Level (dB re 1 µPa @ 1m) 185–192 dB (5 Levels)
Ranging Precision Better than 15 mm
Telemetry Protocol Sonardyne SMS and modem
Ranges Tracked 14 simultaneous replies
Lodestar AHRS Heading Range 0–360°
Accuracy 0.04 to 0.1° secant latitude
Settle Time <5 minutes
Follow Up Speed 500° / second
Resolution 0.01°
Roll and Pitch Range ±180° (no physical limit)
Accuracy 0.01°
Resolution 0.01°
Heave Range ±99 m
Accuracy (Real Time) 5 cm or 5% (whichever is the greater)
Bandwidth User selectable
Resolution 0.01 m
Digital Output - Output Telegram (e.g. for ROV LED display) Yes
ROV Switch - Contact Closure Yes
Data Back-up - Data Logger 8 GB (expandable to 32 GB) internal memory to allow post processing
Remote Transducer - For ROV Applications, a Remote Transducer is Available
Sensors Sound Speed Sensor ±0.03 m/s
Pressure - Strain Gauge or Digiquartz 0.01% FS
Physical Size (Diameter x Length) 248 x 918 mm
Weight in Air/Water 45/17 kg

Manuals and quick start guides

Software and firmware

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Built to support subsea construction