Seaway Alfa Lift
A dynamically positioned foundation installation vessel for the offshore wind industry. The vessel combines the benefits of a semi-submersible transport vessel with a large, 3,000 mt lifting capacity main crane capable of performing heavy lift crane operations with the main deck submerged. Custom-designed by Ulstein, she serves the early development stage of new offshore wind farms.
Primary Specifications
Additional Data
The new build was originally ordered by OHT (Offshore Heavy Transport) and later acquired by Seaway7. The vessel was constructed at the CMHI Haimen shipyard (Yno CMHI-207). After delivery, the vessel headed to Europe for the completion and commissioning of remaining mission equipment.
The vessel's capabilities match future offshore wind industry requirements. The 216.3-metre vessel has a 10,000+ m² "smart deck" that can carry up to 14 giant monopiles per trip and is fully submersible to a depth of 14.66 metres. The Seaway Alfa Lift can install all types of bottom-fixed offshore wind foundations, transport topsides and subsea modules, and transport other heavy cargoes within oil and gas.
Her first assignment was to transport monopile foundations and transition pieces to the Dogger Bank's North Sea site, over 130km off the north-east coast of England, and install them in water depths up to 35 metres using her 3,000-tonne crane, state-of-the-art mission equipment, and smart deck handling system.
The offshore wind industry is moving towards larger turbines and deeper waters, increasing the need for higher carrying capacities, comfortable accommodation, vessel flexibility, and operational safety. The Seaway Alfa Lift design is a breakthrough, achieving higher operational performance without compromising economic efficiency. The vessel can transport and install foundations for offshore wind farms and perform heavy transportation, installation, and decommissioning activities in other markets. Equipped with exhaust gas scrubbers, Tier III-compliant engines, and a battery package, fuel consumption and emissions are reduced.
The vessel was one of three nominees for the OSJ Offshore Renewables Award 2020.
Ship history
March 2019: Steel cutting
October 2019: Keel laying
January 2020: Nominee for the Offshore Renewables Award
February 2021: Launching at the CMHI yard
2022: Delivery