Cable Trenching & Burial for Offshore Wind

DeepOcean provides industry‑leading subsea cable trenching and burial services for offshore wind inter‑array and export cables, utilising the UT‑1 Ultra Trencher—the world's most powerful free‑flying jet trenching ROV with 2.1 MW of total power. The UT‑1 achieves burial depths up to 3 metres in challenging seabed conditions (soft sediment, sand, mixed ground) and accommodates cable diameters up to 1,300 mm, with operating depth capability to 1,500 metres. Sophisticated drive motors allow precise control of pressure and flow, optimising performance across varied soil types whilst minimising seabed disturbance.

Our trenching capability includes pre‑cut trenching (ahead of cable lay), simultaneous lay‑and‑burial, and post‑lay burial, with real‑time burial depth monitoring and as‑built survey. DeepOcean has successfully buried thousands of kilometres of subsea cables globally, including recent offshore wind campaigns in the US (inter‑array trenching & survey) and Europe.

DeepOcean delivers industry-leading subsea trenching and burial solutions, supporting the efficient installation of offshore wind inter-array and export cables.

At the forefront of this capability is the T1500+, an advanced jet trenching ROV designed for operations in water depths of up to 500 m. Building on the proven T1000 platform, the system has been upgraded with an additional 500 hp, delivering a powerful 1,500 hp (1,125 kW) subsea solution.

Designed for high performance in demanding conditions, the T1500+ operates in currents of up to 3.5 knots and achieves burial depths of up to 3 m. Its versatile 3 m adjustable jetting tool supports a wide range of product diameters, including efficient splice burial.

Downward-facing nozzles ensure effective trenching across all sand grades and cohesive soils up to 75 kPa, while a sensor-equipped depressor arm enables precise, controlled cable placement—enhancing installation quality and consistency.

With its combination of power, precision, and flexibility, the T1500+ is one of the most capable jet trenching ROVs available. Supported by a High Sea State Launch and Recovery System, it can be deployed safely in harsh offshore environments, withstanding significant wave heights of up to 2.5 m.