Efficient inspection of subsea cathodic protection systems, positioning of buried power cables and mineral exploration

Introducing Argeo Listen

Argeo Listen is a passive electrode-and magnetometer system for electric-and magnetic field measurements in sea water. The system is modular and can be implemented into various underwater vehicles.

Currently the system is fully integrated on Argeo’s AUV platforms which can operate down to 6000m water depth.

Argeo Listen is perfect for inspection of subsea cathodic protection systems, positioning of buried power cables, marine mineral exploration and general site surveys.

Save time on inspection with shorter time to

high quality results

Marine Minerals exploration

Inspection of subsea cathodic protection systems

Positioning and burial depth of active power cables

Cathodic Protection

Zinc sacrificial anodes are used to protect pipelines and subsea installations from corrosion. The anodes corrode in stead of the pipeline and needs to be replaced from time to time. By flying Argeo’s AUV over the pipe Argeo Listen measures and identifies the condition of these anodes from the strength of the electromagnetic field. The measurements can be used to determine the need for replacement.

Cable Inspection and positioning

By flying Argeo’s AUV over the seafloor Argeo Listen can localize electrical cables that have been buried or exposed by shifting sand dunes on the seabed. The tool pinpoints the cable’s position including burial depth, in real time. Repeated surveys can be used to predict future trends in cable positioning movements and changes in burial depths. 

Up to 150 km

Of high productivity

3-3,5 knots


Near Realtime

Data analysis during
field operations

Benefits of Argeo Listen

  • Efficient inspection of cables and pipelines, both buried and on seafloor
  • Rapid estimation of cathodic protection status and remaining lifetime
  • Simultaneous data acquisition with other sensors
  • Complete characterisation through integration of all sensor data
  • Faster project turnaround providing safer operations with lower HSE risk
  • Accurate and high-quality data with low noise levels
  • The system is modular and can be installed on a variety of underwater platforms

Experience the full potential of Argeo Listen, where excellence in electromagnetic technology meets a range of invaluable advantages.


Passive EM system:
Cathodic protection measurements and analysis

Measured Data

From the initial measured data


Processed Data

Here you can see the resulting output electric current density above the pipeline


Integrated Data

This information is used to determine the status of the Cathodic protection system in our digital Ocean Space data management platform Argeo Scope, where the Cathodic protection field is draped onto the pipeline and visualized

Latest news

Half-year operational update

Half-year operational update

Below are highlights from our half-year operational update from Argeo. You can download the full update presentation here: Download Full Operational Update (PDF) Vessel Inspection: Completed intermediate planned vessel inspection in Durban Docking &...

read more