Tech Blog

Ocean waves with a very long wavelength are often called infra-gravity (or sometimes sub-harmonic or simply long period waves) are formed from groups of shorter period waves as they interfere with each other close to coastlines.

The environments in which undersea power cables operate are highly dynamic. To protect these critical assets from the harsh realities of the seabed, the offshore renewables industry is increasingly turning to Distributed Acoustic Sensing (DAS).

Cable Burial Risk assessment / Depth of Burial is the standard approach for cable health awareness – but it is expensive, time consuming and has massive temporal gaps. Indeximate fixes this with new Automated Depth of Burial now incorporated in Scattersphere for Subsea Power Cable – online monitoring for cable health.

Energy from the tides is a predictable and plentiful resource. Extracting it from the sea, though, presents engineering challenges as infrastructure must withstand some of the harshest marine environments on the planet. In this blog, we explore how Indeximate’s continuous monitoring of the MeyGen export cables have helped their O&M team overcome some of these challenges.

The environments in which undersea cables operate are highly dynamic. Strong currents, tidal flows, and seabed interaction can introduce a variety of mechanical stresses that affect cable health over time.

Ocean waves are a constant and defining feature of the marine environment. Accurately measuring their height, period, and direction is essential for a wide range of applications, from environmental modelling and coastal forecasting to offshore energy operations and marine safety.

Here at Indeximate, we listen to what your cables tell us. We ‘listen’ using Distributed Acoustic Sensing (DAS) which returns a rich data stream of strain measurements at distinct intervals along the cable, several thousand times per second.

Sudden and catastrophic failure in subsea power cables is most frequently the consequence of a lack of consistent and comprehensive data on mechanical endurance. Measurement of the long-term mechanical fatigue of subsea power cables remains one of the most significant blind spots in offshore asset management. While fatigue is recognised as a leading cause of cable failure, the actual fatigue accumulated by these complex, multi-layered structures is often not well understood during service.

Subsea power cables don’t just carry electricity, they generate powerful electromagnetic signals that reveal how their internal structure changes over time.

In our latest blog, we explore how these 50/60 Hz signals can be detected using Distributed Acoustic Sensing (DAS). Once interpreted, these signals offer unprecedented insight into cable armour integrity and the overall cable health.

Cable burial is the first line of defence in offshore wind, protecting export cables from anchors, trawls, tidal forces, and long-term environmental wear. But burial isn’t permanent. Seabed mobility, storms, and even installation techniques can shift material over time, leaving critical sections exposed without anyone knowing. Our latest blog explores how operators can finally gain continuous visibility of burial and exposure conditions