July 18, 2008
IHC Merwede launches DSV
Launched today at the IHC Merwede yard in Hardinxveld Giessendam, the Netherlands, the Diving Support Vessel Seven Atlantic is under construction for Subsea 7.
Designed by Merwede Shipyard in close liaison with Subsea 7 and the dive spread manufacturer, it has the following main characteristics:
Length, OA--141.55 m
Length BP, on design draft--128.96 m
Breadth molded--26.00 m
Depth maindeck molded--12.00 m
Draft design molded--7.00 m
Draft scantling molded--8.00 m
Deadweight (incl. payload) at design draft approx. --7,815 t
Deadweight (incl. payload) at scantling draft approx.--11,000 t
The vessel has been built to Lloyd's Register + 100A1, Diving Support Vessel, UD strength for load of 10 t/m2, Helicopter Landing Area,+LMC, UMS, DP(AAA), CAC(2), EP, ICC .
The vessel has been designed for saturation and air diving support work. The integrated saturated diving system is accommodated in the midships of the vessel and is suitable for a total capacity of 24 divers; 8 diving teams, each consisting of three divers. The dive system is designed for operations in water depths of up to 350 m .
Twin air dive stations, twin observation class ROV deployment system are integrated in the vessel. In addition the vessel has an extensive Scale Squeeze system for well treatment and will be capable of carrying a 3,000 ton carousel, work class ROVs and a 12 meter long air diving daughter craft on the aft deck. A clear and useful deck area of 1,200 sq. m and a 120 t crane is provided.
The ship exceeds all current safety standards as the layout of the 6.6kV integrated electric power generation and propulsion system is for DP3 with triplicate redundancy. The ship has three electro-motor driven fixed pitch propellers in azimuthing nozzles aft. Two retractable azimuth thrusters are fitted in the forward part of the vessel; one transverse thruster is arranged in a tunnel forward.