Siem Offshore has exercised an option with Singapore’s STX OSV Holdings (STX OSV) to design and build two additional offshore subsea construction vessels (OSCV), as well as awarding a $55m contract to Fjellstrand to build one infield support vessel.
The vessels ordered with STX OSV will be based on the OSCV 11 design and will have a length of 121m and a beam of 22m.
Both OSCVs will be equipped with a 250t AHC crane and launch and recovery systems (LARS) for remotely operated underwater vehicles (ROVs).
STX OSV Tulcea in Romania will deliver the hulls of the vessels, while the complete vessels are scheduled to be delivered from STX OSV Brattvaag in Norway in the second quarter of 2014.
STX OSV Norway is already building two OSCVs for Siem Offshore, which are expected to be delivered in the third and fourth quarters of 2013.
The Singapore-based shipbuilder also has two platform supply vessels (PSVs) under construction in Brazil for the same customer.
Siem Offshore has awarded a second contract to Norwegian yard Fjellstrand to build an infield support vessel, with an option for a second identical vessel.
Based on the Ulstein SX 163 design, the vessel will have a length of 74m, beam of 17m and is scheduled to be delivered in March 2014.
The vessel will be capable of accommodating 60 people, and will be equipped with cranes and an active heave compensated gangway-based offshore transfer system that enables safe transfer of personnel to fixed and floating structures.
The vessel will run on a diesel electric propulsion system as well as two Voith Schneider Rudder ECS propeller units.
Siem Offshore intends to operate the vessel within the offshore renewable energy and oil and gas markets to carry out installations, repairs, maintenance and general service duties.
Image: The OSCV vessels will be built to STX’s OSCV 11 design and are expected to be delivered to Siem Offshore in the second quarter of 2014. Credit: courtesy of STX OSV.