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and generator sets on board to conduct maintenance at sea and refueling is carried out by dedicated support vessels. The vessel is equipped with two CP (controllable pitch) propellers in a nozzle, each driven by two frequency con- verter-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 Sirius complies with the Clean Design demands as well as the redundant propulsion notation from DNV. The vessel?s redundant propulsion system ensures that propulsion and steering remain intact after failure in parts of the system. Diesel electric propulsion reduces fuel con- sumption and atmospheric emissions. In addition to mod- ern systems for sludge, garbage and sewage handling, a complete ballast water treatment system has been installed on board. The system prevents the spreading of marine organisms from one geographic area to another with the ballast water, a cause of potentially serious ecological, economical and health problems in the host environment. The ship?s instrument room, with its ergonomically designed interior, is located at the stern with large win- dows facing the sea. It is placed directly above the seismic area, with a direct view of the streamer deck. A storage area above the instrument room is served by a knuckle jib crane with a capacity of 10 tons at 20m outreach. The two offshore cranes placed on C-deck mid-ship have a capaci- ty of 15 tons at 18m outreach and can be used to lift sup- plies on board from service vessels. Ulstein Power & Control has delivered a substantial amount of equipment for the vessel, including the information and communica- tion system ULSTEIN COM, the navigation systemULSTEIN NAV, and the integrated automation system ULSTEIN IAS, which is equipped with integrated mod-ules, among them PMS (power management system) and modules for monitoring of the helideck and the ballastwater treatment system. www.seadiscovery.com Marine Technology Reporter 17(Continued from page 14) MTR#8 (1-17):MTR Layouts 10/11/2011 10:31 AM Page 17
