Information Density: Seaway7 – Signal Evidence & AI Readability

[H1] EPCI Solutions

[H1] Heavy Transportation

[H1] Heavy Lifting

[H1] Wind Turbines

[H1] Offshore Cables

[H1] Floating Wind

Cable Laying Services

Cable Laying Services

Seaway7 offers submarine cable- and subsea umbilical installation, repair and maintenance services.
Related services such as dive and Remote Operated Vehicle (ROV) support, marine survey, Unexploded Ordnance (UXO) investigation and remedial cable protection services are also provided.

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WTG Foundations

WTG Foundations

Seaway7 offers installation services for WTG foundations utilising their ground-breaking custom built foundation installation vessel Seaway Alfa Lift as well as their established Heavy Lift Vessels (HLV), Seaway Strashnov and Seaway Alfa Lift.
In the last 12 years Seaway7 has built up an extensive track record in installing a wide range of foundation types, ranging from monopiles and suction bucket jackets to tripod and pre-piled jackets using a pile installation frame.

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Offshore Substations

Offshore Substations

Using our Heavy Lift Vessels, Seaway7 can provide the transportation and installation of offshore substation jackets and topsides. Mid 2020, we had successfully installed more than 30 HVAC platforms.
The DP3 HLV Seaway Strashnov with its 5000t crane is especially well equipped for this work.

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Wind Turbines

Wind Turbines

Seaway7 provides fully integrated Transport and Installation (T&I) services for offshore wind turbine generators (WTGs) utilising the company’s next generation jack-up installation vessel Seaway Ventus.
With the organisation, people, vessels and systems in place, and a strong track record – Seaway7 are the ideal partner for the installation of offshore windfarms.

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Heavy Transportation

Heavy Transportation

Seaway7 is one of the most experienced heavy transport vessel operators in the world, providing highly engineered transportation solutions for the most demanding cargoes – safely and on time.
The six Seaway7 open deck semi-submersible heavy transportation vessels; Eagle, Falcon, Hawk, Osprey, Swan and Albatross are suitable for dry transportation of offshore wind foundations, offshore modules and all other oversized floating and non-floating cargoes.

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Seaway7 has been active in the offshore Renewables Energy industry since 2009, when we installed our first Wind Turbine Generator (WTG) monopile foundation offshore in the UK. Seaway7 has since built an industry-leading track record in installing WTG foundations, substations and inner array cables for many of the key offshore wind developers in Europe, Taiwan and the US.

[H2] Our services
Our offshore experience in the energy sector spans three decades, successfully completing over 50 projects and transferring offshore knowledge gained in the oil and gas industry to support the energy transition and offshore fixed wind market.
Seaway7 has been active in the offshore Renewables Energy industry since 2009, when we installed our first Wind Turbine Generator (WTG) monopile foundation offshore in the UK, and has since built an industry-leading track record in installing WTG foundations, substations and inner array cables for many of the key offshore wind developers in Europe, Taiwan and the US.
To date Seaway7 has installed over 800 wind turbine generator foundations, 30 substations and 2500km of inner array cables.

Cable Laying ServicesWTG FoundationsOffshore SubstationsWind TurbinesHeavy Transportation

23 Mar 2026
Seaway7 appoints Lloyd Duthie as Chief Executive Officer
Seaway7 has appointed Lloyd Duthie as Chief Executive Officer, effective 1 April 2026. Lloyd succeeds Stuart Fitzgerald, who will take up the role of CEO of Subsea7 as announced by the Group earlier this month.
Lloyd has more than 25 years’ experience with the Subsea7 Group and has held senior leadership roles, most recently as Seaway7’s Deputy CEO and Vice President for the UK and Asia business unit.
Stuart Fitzgerald said:
“Lloyd’s appointment ensures seamless continuity for Seaway7. His extensive experience, a strong track record across our projects and longstandin

29 Jan 2026
Seaway7 awarded contract for Gennaker offshore wind farm in Germany
Seaway7 has been awarded substantial1 contract by OWP Gennaker, part of Skyborn Renewables, for the Gennaker offshore wind farm in Germany.
Seaway7’s scope of work includes the transportation and installation of the 63 monopiles and transition pieces. Offshore activities are expected to commence in 2027.
Stuart Fitzgerald, Seaway7’s CEO, said: “Seaway7 has a strong track record in Germany, having supported over 20 projects and enabled almost 3,500 MW of clean energy for the country. We are delighted to bring this experience to the project and continue our collaboration with Skyborn Ren

8 Dec 2025
Seaway7 awarded contract for BC-Wind project in Poland
Seaway7 has been awarded a sizeable contract by Ocean Winds for the BC-Wind project.
The BC-Wind offshore site is located in the Baltic Sea, approx. 23 kilometres off the Polish coast, and will comprise 26 wind turbine generators. Seaway7’s scope of work includes the transport and installation of 26 transition pieces and an offshore substation with offshore activity expected to commence in 2027.
Stuart Fitzgerald, Seaway7’s CEO, said: “We are looking forward to supporting Ocean Winds on the BC-Wind project and being able to continue contributing to the Polish offshore wind targets with o

62

Renewables Projects

1300+

WTG Foundations

1400+

Cables

35+

Substations

3400+

Km Cables

19+

GW

[H2] Key Projects

Hornsea Offshore Wind Zone
Seaway7 is delivering transport and installation of inter-array cables for the Hornsea Offshore Wind Zone. The work spans three project phases, with Hornsea 1 and 2 completed and Hornsea 3 underway.

Seagreen Offshore Wind Farm
Seaway7 delivered integrated EPCI for foundations and inter-array cables at Seagreen. This landmark project featured large-scale suction caisson jackets and the world’s deepest fixed wind foundations.

Hollandse Kust Zuid Offshore Wind Farm
Seaway7 delivered integrated transport and installation of monopiles and inter-array cables for the Hollandse Kust Zuid Offshore Wind Farm.

Yunlin Offshore Wind Farm
Seaway7 delivered EPIC for inter-array and export cable systems for the Yunlin Offshore Wind Farm, a major offshore wind project in Taiwan.

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[H1] Our Fleet

Home » Our Fleet

[H1] Our Fleet
Seaway7 owns and operates a state-of-the-art fleet providing world class capabilities and scale. The Seaway7 fleet includes Cable Lay Vessels, Heavy Lift Vessels, Transportation Vessels and a Jack-up Installation Vessel.

Seaway Aimery

Seaway Albatross

Seaway Alfa Lift

Seaway Eagle

Seaway Falcon

Seaway Hawk

Seaway Moxie

Seaway Osprey

Seaway Swan

Seaway Ventus

Seaway Phoenix

Seaway Strashnov

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[H1] Cable Laying Services

Home » Our Services » Cable Laying Services

[H1] Cable Laying Services
Seaway7 offers submarine cable- and subsea umbilical installation, repair and maintenance services.
Related services such as dive and Remote Operated Vehicle (ROV) support, marine survey, Unexploded Ordnance (UXO) investigation and remedial cable protection services are also provided.

[H3] Cable Laying Services
In cable laying, Seaway7 can perform the installation of inner-array grid cables (IAG cables); and export cables.
For the IAG cable installation works, we use the world’s most sophisticated, bespoke designed vessels to make sure that the product is laid safely, with precision, in all weather conditions. Cable Lay Vessels (CLV) Seaway Phoenix and Seaway Aimery, built in 2016, are fitted with the most modern equipment available to ensure that as few weather delays as possible are encountered during the installation campaign, giving our clients the schedule security that they need to complete their projects on time.
Seaway Aimery has two under deck turntables, giving a capacity of 4,250 tons of cable that can be arranged in split compartments to maximize offshore flexibility of installation sequence. Seaway Aimery has proven that it can safely lay cables in significant wave heights of up to 3.0m, while the cable hangar provides climate-controlled shelter for the crew during these operations.

[H3] Cable Trenching Services
Seaway Aimery is equipped with an on-board trenching ROV housed in a hangar on the starboard mid-ships, which can operate in depths of up to 3.0m.
Installation Support Vessel (ISV) Seaway Moxie was developed specifically to address this demand on offshore wind farms, where the pull-in teams on foundations and platforms were unable to access the structures in harsher weather conditions. Seaway Moxie was the first of its kind to operate in offshore wind farms in Europe. It was designed and built to allow offshore personnel safe access to foundations and platforms in calm and rough seas, making up to 54 successful connections and transfers in a 24 hour period; and able to work in up to 3.5m significant wave heights.

[H3] Walk-to-Work Operations
The term ‘Walk-to-Work’ originates from the desire to offer offshore personnel the opportunity to transfer to offshore structures without requiring them to first climb up a ladder or be transferred using a transfer basket on a crane.
Installation Support Vessel (ISV) Seaway Moxie was developed specifically to address this demand on offshore wind farms, where the pull-in teams on foundations and platforms were unable to access the structures in harsher weather conditions. Seaway Moxie was the first of her kind to operate in offshore wind farms in Europe. She was designed and built to allow offshore personnel safe access to foundations and platforms in calm and rough seas, making up to 54 successful connections and transfers in a 24-hour period; and able to work in up to 3.5m significant wave heights.

[H3] Offshore Cables – Related Services
Seaway7 can provide a number of additional services either as part of turnkey projects or separately as individual services, such as:
Marine cable route survey and route engineering
Unexploded ordinance (UXO) detection, identification and removal
Pre-lay grapnel runs and route clearance
Boulder clearance and relocation
ROV intervention and dive support
Rock bag and concrete mattress installation
Scour protection

[H3] Cable Storage
Seaway7 operates a logistic center and marine base in Eemshaven (The Netherlands), where we also provide storing facilities for submarine cables and related accessories.
We provide flexible cable storage solutions to clients, being able to utilize our existing facilities for various lengths, or by providing stand-alone cable storage solutions on a temporary or long-term basis at client convenient locations.

[H3] Inspection, Maintenance & Repair
In addition to installation services, Seaway7 can also provide a wide range of inspection, maintenance and repair (IMR) services spanning both the submarine cables as well as broader structure and ancillary service requirements.

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[H1] Wind Turbine Generator Foundations

Home » Our Services » WTG Foundations

[H1] WTG Foundations
Seaway7 offers installation services for WTG foundations through its Heavy Lift Vessels (HLV), Seaway Strashnov and its new custom built foundation installation vessel, Seaway Alfa Lift. 
In the last 12 years Seaway7 has built up an extensive track record in installing a wide range of foundation types, ranging from monopiles and suction bucket jackets to tripod and pre-piled jackets using a pile installation frame.

For installation, we are using an impact hammer and/or vibratory hammer depending environmental and soil conditions. To minimise the environmental impact, Seaway7 will provide pile driving noise mitigation measures based on the latest available technology.
Following a multi-year innovation program, we have developed and successfully tested a method whereby monopiles can be installed on dynamic positioning. To date, installing monopile foundations on anchors rather than using dynamic positioning has been the norm. This specialised solution allows us not only to reduce our installation cycle times but the overall project duration and the associated cost. Any limitations with regards to impacting the seabed or local infrastructure have all but been removed.

[H2] Monopile installation on DP
Following a multi-year innovation program, including extensive data collection during numerous monopile installation campaigns with our floating crane vessels, we are proud to show you a successful monopile installation on DP with our Seaway Strashnov.
View our fleet of heavy lift vessels.

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