Renewables - Sea fastening and mobilisation

We safeguard people and assets

Sea fastening for wind turbine components

We have extensive experience with sea fastening design, engineering, fabrication and installation for offshore wind turbine components such as blades, nacelles, hubs and towers.

From start to finish - we handle your project in our well-equipped fabrication and yard facilities with direct access to quayside for unloading and mobilisation.

High-quality solutions delivered on time

Blade handling systems for offshore wind turbines

Our consultancy engineering division has been involved in design and manufacture of an all-new blade handling system. Today, the system makes lifting, installing and shipping offshore wind turbine blades easy and less time-consuming.

Moreover, as in every project we are involved in, we delivered high quality to deadline, thanks to our highly skilled in-house engineering staff and our own advanced workshops.

Case: MHI Vestas Offshore Wind A/S

Fabrication of spreader bar

The spreader bar is designed as a combined tool so that it can be used for lifting of different load configurations. The scope also included the delivery of a complete set of lifting gear consisting of Cortland Dyneema Cordura slings, a wide body shackle and a plate shackle. All lifting gear was delivered according to DNV approval from Esbjerg, Denmark (2016).

Case: Seajacks

Seajacks Scylla

The project scope consisted of fabrication and sea fastening of the bladerack structure and tower grillage with adaptors. The sea fastening installed during this mobilisation will with minor modifications serve for three types of WTG’s. Delivered from Esbjerg, Denmark (2016).

Case: Crane Upgrades

Wind Orca - Crane Extension

For Cadeler AS, we extended the crane boom on the Wind Orca in Esbjerg from November 2021 to March 2022. We installed a 7-metre boom insert, performed load testing, and achieved certification. The scope included demobilizing the crane, constructing a habitat for cutting and welding, conducting NDT and painting, and reinstalling and rewiring the crane for successful recertification.

Case: Vessel Mobilization

Vessel Upgrade & Mobilization Seajacks Scylla

For Seajacks UK Limited, Semco Maritime upgraded and mobilised the Seajacks Scylla in Esbjerg from October 2020 to February 2021. The scope included transporting and modifying 700 tons of sea fastening, installing a Ballast Water Treatment System, and performing vessel reinforcement, thruster seal replacement, hull cleaning, and painting.

Case: Crane Upgrade

Wind Orca and Wind Osprey - New Cranes

For Cadeler A/S, we executed a project in Rotterdam from October 2023 to March 2024. The scope included planning, supplier coordination, installing a new boom rest, and reinforcing the crane pedestal. We worked on two vessels simultaneously, managed the EPCI scope, performed electrical upgrades, modified mooring spaces, and achieved recertification and third-party approval.

Andreas Petersen

Sales & Business Development Manager, Rig and Marine

Semco Maritime A/S
Esbjerg Brygge 30
6700 Esbjerg
Denmark

Esbjerg, Denmark

Head office

Semco Maritime A/S
Esbjerg Brygge 30
6700 Esbjerg
Denmark

CVR no. DK 2549 0762

REX-no. DKREX170591191
EORI no. DK25490762

Offshore wind farm assets

Sea fastening and mobilisation

We secure your assets for road and sea transportation.

Complete engineering, procurement, construction and installation. Excellent fabrication and yard facilities with direct quayside access.