Subsea News

Our fascination with the depths of the ocean revealed itself in some of our most-read stories of 2025.What’s really down there? asked New Wave Media President Greg Trauthwein in his interview with Matt Grove, Regional Segment Manager Offshore at Seequent in September, in the most watched Offshore Engineer TV show.Working underneath the world’s waters is a challenge in and of itself, a challenge exacerbated if an operator does not have a clear picture of the make-up of the seabed with insights on the potential traps that might await.

Norwegian offshore supply vessel owner DOF Group has secured seven new contract extensions with Petrobras for its offshore support vessels (OSVs) in Brazil, valued over $160 million.Five of DOF's Brazilian-flagged anchor handling tug supply (AHTS) vessels, all with ROVs on board, including Skandi Fluminense, Skandi Paraty, Skandi Angra, Skandi Urca and Skandi Iguaçu, have had their current contracts with Petrobras extended until the first quarter of 2027.The new four-year contracts…

Ukraine said on Monday it hit and disabled a Russian missile-carrying submarine docked at a Black Sea naval base using underwater sea drones for the first time, but Moscow denied the strike caused any damage.The attack with Ukrainian-made "Sub Sea Baby" drones hit the submarine in the port of Novorossiysk where Russia has rebased many of its Black Sea naval vessels to put them out of reach of Ukrainian strikes, the Security Service of Ukraine (SBU) said.Footage published by the…

Belgian offshore contractor Jan De Nul has concluded the 2025 transport and installation campaign of three HVAC grid connection cables at TenneT’s DolWin kappa platform.When finalized, these cables will ensure the transport of almost 660 MW renewable electricity from two offshore wind farms, which is enough energy needed to power more than 800,000 German homes.Jan De Nul and partner Hellenic Cables are responsible for design, production, transport, installation and protection of three 155 kV HVAC cables with a total length of 37 km.

DEME has secured three contracts for the installation of monopile foundations, inter-array cables, and the export cable at the BC-Wind offshore wind farm in Poland.The combined contracts are valued between $174 million and $350 million (€150 million and 300 million).BC-Wind, developed by offshore wind firm Ocean Winds, a 50-50 joint venture between EDP Renewables and ENGIE, is located approximately 23 km off the Polish Baltic Sea coast.With a planned capacity of up to 390 MW, the wind farm will generate clean electricity for around 500…

Ocean services provider DeepOcean has secured an extension to its existing frame agreement with Equinor for the provision of subsea inspection, maintenance, and repair (IMR) services.As a part of the renewal, DeepOcean will deploy specialized IMR vessels, along with comprehensive subsea services, throughout 2026 and into 2027.The scope of work also includes onshore engineering and project management services for various subsea operations.With this contract, DeepOcean will deliver uninterrupted IMR activities for Equinor from 2006 to 2035…

Fincantieri is advancing its push into high-tech maritime infrastructure through a new agreement with WSense, a fast-growing underwater technology scale-up specializing in subsea communication and environmental monitoring systems. The partnership—signed by Giorgio Bellipanni, CEO of Fincantieri Infrastructure Opere Marittime, and WSense CEO Chiara Petrioli—aims to integrate real-time underwater sensing and Internet of Underwater Things (IoUT) capabilities into major port and coastal projects.Under the collaboration…

Kongsberg Maritime has signed a major contract with Sea1 Offshore to deliver Launch and Recovery Systems (LARS) for the company’s four new offshore construction vessels. Each vessel will be equipped with two advanced LARS units, supporting subsea construction and ROV operations.The scope of supply per vessel includes two telescopic A-frames, fully electrical umbilical winches, energy efficient hydraulic power units, and a dedicated control system. Each system offers a safe working load of 15 tonnes (vehicle dry weight) and winch cable capacity of 4…

Fugro has completed the geotechnical site investigations at the eastern array of Dogger Bank South Wind Farm, off UK.Fugro’s five-vessel campaign gathered core samples and cone penetration tests (CPT) data up to 50 meters below the seabed.According to RWE, which is developing the project together with partner Masdar, the results of the campaign will provide vital insights for designing turbine and platform foundations.Dogger Bank South (DBS) consists of two offshore wind farms - DBS East and DBS West - with an estimated combined capacity of 3 GW.RWE leads both DBS projects…

Danish power cable maker and services provider NKT has concluded a turnkey repair of one of the 220 kV high-voltage AC subsea export cables connecting the Beatrice offshore wind farm in the Scottish Moray Firth to the Aberdeenshire coast.The repair was executed in 38 days, according to NKT, which was hired for the repair job following an unplanned transmission outage that occurred in April 2025 on one of two of Beatrice’s Transmission Capital Partner (TCP) owned export cables.The malfunction reduced the site’s export capacity by 50%…

Norwegian offshore vessel owner Solstad Maritime has signed a contract award with an international subsea contractor for the Normand Sentinel contract support vessel (CSV).The firm contract will start early 2026 and will keep the Normand Sentinel fully committed until the end of 2027. The agreement, with an undisclosed client, also includes one yearly option thereafter.Normand Sentinel will support the client’s operations worldwide. As part of the charter party, Solstad Maritime will deliver…

Italian offshore services provider Next Geosolutions (NextGeo) has secured a new contract worth around $9.8 million by Saipem for offshore survey and installation support activities under the Bouri Gas Utilization Project (BGUP) in North Africa.The contract covers survey and construction support work for the development of the Bouri gas field, located off the Libyan coast, one of the largest offshore initiatives in the region aimed at boosting gas recovery and utilization.Next Geosolutions said the project will involve deployment of its vessels NG Worker and NG Surveyor…

Whether you're in offshore wind, grid operations, geotechnical engineering, or digital transformation, this session, in conjunction with Offshore Engineer, will offer actionable insights, live demos, and expert opinions on:Why cable heat matters — from environmental impact to dynamic ratingHow to build better ground models using connected workflows and 3D subsurface dataHow thermal analysis drives smarter decisions with predictive modeling for route design and optimizationWhy Attend?Subsea cable heating is more than a technical challenge — it’s a strategic opportunity.

Norwegian offshore supply vessel owner DOF Group has secured a contract with BP for the provision of subsea services in the Atlantic region.The three-year firm and two-year options contract will see DOF deploy a high-capability subsea vessel asset to support BP with subsea construction, installation, repair, and maintenance (IRM) operations.Offshore operations are expected to begin in the first quarter of 2026.Financial details related to the agreement, including rates and overall revenue…

Belgian marine contractor Jan De Nul has ordered a rock installation vessel, specifically built to strengthen the protection of offshore energy and subsea data infrastructure.The vessel, named George W. Goethals, will be the company’s largest rock installation ship to date, with a carrying capacity of 37,000 tonnes. It will be equipped with ultra-low emission technology and engines capable of running on biofuel and green methanol.According to Jan De Nul, using its flexible vertical fall pipe and an inclined fall pipe system…

Twelve new research projects will strengthen Norway’s ability to prevent and handle serious incidents that threaten life, health, and critical infrastructure.Topics include handling hybrid threats in Norwegian sea areas, early warning systems for critical underwater infrastructure, security management for renewable energy systems, natural hazards, societal vulnerability, and citizen involvement in crisis management.The projects are financed by funds from nine ministries: the Ministry of Justice and Public Security…

Enshore Subsea has installed the first of two offshore export cables at Inch Cape offshore wind farm, using the CMOS Installer cable laying vessel.Operating from the Port of Blyth, the vessel installed the first of two 85-kilometre export cables for the 1.1 GW offshore wind farm, being built off the east coast of Scotland.The 220 kV, three-phase export cable was installed in three 28-kilometre sections.Once operational, the cable will transmit power from the offshore wind farm to the project’s new onshore substation under construction at Cockenzie…

Subsea technology company Seatools has been awarded a contract by Jan De Nul for the design and delivery of a Fall Pipe ROV (FP-ROV) that will form a key system of the Belgian contractor’s recently ordered subsea rock installation vessel, the George W. Goethals.The ROV will play an essential role in the vessel’s mission to protect critical subsea infrastructure by enabling highly accurate and controlled rock placement around cables and foundations, safeguarding assets that underpin…

Mermaid Subsea Services (UK) has completed a fast-track subsea recovery campaign in the North Sea for a major operator.The operation involved the internal and external severance of casing, conductor, guide pipe and cement lines, as well as local seabed excavation and recovery of the CAN-Basic structure.Mermaid also handled waste management of recovered items and backfill operations to prepare for an over-trawl survey. “This was a time-critical project, and our team responded with professionalism and agility to ensure safe and efficient delivery.

Sponsored WebinarHow Hot Is Your Cable? Seequent Unlocks Subsea IntelligenceCable temperature drives ampacity, reliability, and lifecycle costs. See how subsurface models and field data help predict, monitor, and manage thermal performance to keep offshore power flowing.Date: Thu, Nov 13, 2025Time: 12:00 GMT / 7:00 AM ETFormat: Live online • 45–60 minutes + Q&AWhy Attend?Subsea cable heating is more than a technical challenge — it’s a strategic opportunity.

Swedish firm Njord Survey has entered into a frame agreement with Energinet, Denmark’s national transmission system operator (TSO), covering site and route survey services for offshore wind and subsea cable projects.The long-term collaboration reinforces Njord Survey’s position as provider of services to the offshore renewable sector.It follows the agreement company signed earlier in October with German TSO 50Hertz to deliver geophysical and ROV seabed survey service in support…

Belgian marine contractor Jan De Nul has signed a contract with Synera Renewable Energy (SRE) for the installation of export cables on the Taiwanese offshore wind farm Formosa 4.To bring the green energy ashore, Jan De Nul will transport, install and protect 60 kilometers of subsea cables.According to the company, it was also selected as the preferred contractor for export cables on SRE’s wind farm Formosa 6, located 55 kilometers southwest of Formosa 4.Situated 20 kilometers off Miaoli County’s coast…

Remazel, a company of the Fincantieri Group, has signed a contract with Jan De Nul for the supply of mission-critical equipment for a newbuild vessel.The contract covers the design and supply of an advanced system for transporting and laying rocks on the seabed to protect cables and pipelines.The solution developed by Remazel will enable operations at depths of up to 400 meters with a production capacity of 2,000 tonnes per hour, ensuring precision, efficiency and operational continuity even in challenging marine conditions.A centralized control system will coordinate all onboard equipment…