KOAS takes delivery of offshore vessels

20 Jan 2011
The newly delivered AHTS ‘KL Sandefjord’

The newly delivered AHTS ‘KL Sandefjord’

‘K’ Line Offshore AS (KOAS), a subsidiary of Japanese shipping company Kawasaki Kisen Kaisha, Ltd. ('K' Line), recently took delivery of two new offshore support vessels.

They comprise the company’s first large size AHTS KL Sandefjord, constructed at STX OSV Langsten Yard, and its second large size PSVKL Brisfjord, constructed at STX OSV Brevik Yard in Norway.

The 95m AHTS, based on the Aker AHT 12 CD design, features a propeller output of 25,000kW and, according to the company, the world’s largest bollard pull of 390 tonnes. The main power plant consists of two 8MW Wärtsilä 16V32 medium speed mechanical diesels driving two 4.9m Wartsila four-bladed CP propellers. Auxiliary power is provided by five 2,250ekW Caterpillar 3516C gensets providing power for three Wärtsilä FT250 tunnel thrusters (two forward and one aft) and two Wärtsilä FS225 retractable azimuthing thrusters. The 4,800 dwt vessel is equipped with a DP2 system, ROV launching and recovery system and a 250 tonne A-frame.

The second in a four-ship series of 94.9m PSVs to the Aker PSV 06 CD design, KL Brisfjord, is a sister vessel of KL Brevikfjord delivered in September 2010, of 5,100 dwt with a 1,100m2 cargo deck area. The diesel electric plant comprises four 2,250 kWe Caterpillar 3516C gensets powering two Rolls-Royce Aquamaster Contaz 15 azimuthing thrusters, two TT2200 bow thrusters and one azimuthing swing-up thruster.

Both ships feature the so-called ‘clean design’, including double-hull structure for fuel oil tanks and ballast water management systems, ready for entry into force of the IMO BWM convention.

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