Page 38: of Marine Technology Magazine (September 2012)

The marine geophysical company Polarcus Limited received its eighth 3D seismic vessel on 21 June 2012 when Polarcus Adira was delivered at Ulstein Verft in Norway. The vessel is the second of two 12- 14 streamer Arctic 3D seismic vessels built at the yard, and is the eighth vessel in the Polarcus ß eet of the Ulstein SX134 design, characterized by the sleek Ulstein X-bow hull design the shipbuilder has become known for. The sistership Polar- cus Amani was delivered by the yard at the end of March. Earlier vessels were built under license by Drydocks World Dubai LLC.. They include Polarcus Nadia (2009), and Polar- cus Naila (2010), 12 streamer vessels of type SX124, Polarcus Asima (2010) and Polarcus Alima (2011), 12 streamer ves- sels of type SX134, Polarcus Samur (2011) and the Russian ß ag vessel Vyacheslav Tikhonov (2011), 8 streamer vessels of type SX133. The other vessels carry Bahamas ß ag. All vessels are designed by Ulstein Design and Solutions AS. Following a short shakedown Polarcus Adira will commence operations on charter for TGS-NOPEC Geophysical Company ASA (TGS). Polarcus Limited, registered on the Oslo Stock Exchange, operates a ß eet of high performance 3D/4D seismic vessels. Polarcus offers contract seismic surveys and multi-client projects worldwide and employs over 500 professionals. The companyÕs principal ofÞ ce is in Dubai, United Arab Emirates. Main vessel data The hull of Polarcus Adira and Polarcus Amani were built at Kerch Shipyard Zaliv in Ukraine. As is the custom for the ships built by Ulstein Verft shipyard in Ulsteinvik. This was the seventh hull built at the yard. The vessels are equipped with streamer winches, towing points and gun winches. The X-bow hull line design, combined with a redundant diesel-electric propulsion system, ensures good performance with regard to speed and fuel consumption. The overall length of Polarcus Adira, yard number 293, is 92m and the breadth is 21m, which is identical to those of sister vessel Polarcus Amani. Depth to main deck is 9.0 m, design draught is 6.5m and maximum draught 7.5 m.The deadweight at maximum draught is 4,472dwt. Gross tonnage is 7709GT and net tonnage 2313NT. The hydrodynamic efÞ ciency of the X-BOW, result in good sea-keeping abilities, it also provides a safe and comfortable workplace for the crew both during transit and seismic sur- veys, as it eliminates slamming. The soft entry in waves also reduces spray and eliminates icing. The vessel is equipped with a helideck (D-value 22.2 m, 12t, UK-CAA CAP-437 suitable for Sikorsky S-61N / S-92) for added safety and to ensure an efÞ cient crew change, and is built according to IMO code of safety for Special Purpose Ships (SPS), enabling it to operate worldwide. The vessel has two workboats, by Westplast, and a Norsafe MOB boat onboard and six life rafts each for 35 persons with dedicated davit. Machinery The vessel has diesel-electric propulsion. The main propul- sion system comprises two W?rtsil? 9L26 main diesel generators, each 2920ekW at 1000rpm, plus four W?rtsil? 9L20 1710ekW diesel generators, at 1000rpm. The generators are supplied by ABB. The total power is 12,680ekW. There are two propellers of controllable pitch type in nozzles,  e Latest in Seismic Vessel Design from Polarcus By Henrik SegercrantzPhoto credit Ulstein Group / Vasco Pinhol September 201238 MTRMTR #7 (34-49).indd 38MTR #7 (34-49).indd 389/10/2012 9:43:11 AM9/10/2012 9:43:11 AM