July 2, 2010
Ulstein delivers Oceanic Vega
Norway's Ulstein Group has delivered the X-bowed seismic research vessel Oceanic Vega to Eidesvik Seismic Vessels. It is owned through a joint venture between Eidesvik and geophysical company, CGG Veritas.
The Oceanic Vega is the first of two vessels of the SX120 type, designed by Ulstein Design & Solutions. It is a powerful seismic research vessel with a towing force of 140 tons during seismic operations. The vessel is well suited to acquisition of large 3D, 4D or high-resolution projects, utilizing a current streamer configuration of up 16 streamers separated by 100 meters or more. Its 20 streamer winches are each capable of spooling 9 km of streamers.
With an ICE-C classification, the Oceanic Vega is able to operate in cold waters.
The vessel is designed to stay permanently at sea, with five year docking intervals. The redundant propulsion notation from DNV means that engine and generator capacity is adequat to conduct maintenance at sea. Refuelling is carried out by dedicated support vessels.
The vessel is equipped with straight shaft lines to the two CP propellers in nozzles. Each propeller driven by two frequency converter-driven electric motors. This allows smooth speed control of around five knots during seismic acquisition. Two work boats will be used for maintenance of in-water equipment.
Oceanic Vega complies with DNV Clean Design and with SPS requirements for up to 60 persons. There are 52 single cabins and only nine double cabins. The mess room, galley and the four day rooms have large windows facing the sea to add comfort for the crew. The vessel is equipped with a helideck to facilitate an efficient crew change.
The X-Bow results in lower added resistance and smoother bow immersion. This leads to reduced operational disturbances or involuntary speed reduction.
The instrument room is located at the stern, with large windows facing the sea. It is placed directly over the seismic area, with a direct view of the streamer deck. A storage area above the instrument room is served by a gantry crane with a capacity of 2 x 7.5 tons. The two deck cranes, placed on C-deck mid-ship, have a capacity of 15 tons at 18 metres, and serve the storage and provision rooms.
Ulstein Power & Control has delivered a substantial amount of equipment for the vessel, including the information and communication system, the navigation system and the integrated automation system which is equipped with integrated modules, that include a power management system and monitoring of the helideck.
Length over all approx. 106.5 m
Length between p.p. 99.3 m
Breadth molded 24.0/28.0 m
Depth to main deck 10.0 m
Draft max 8.0 m
Design draft 7.0 m