Ulstein Designs PSVs for Otto Offshore

Posted by Eric Haun
Monday, August 25, 2014
Ulstein has entered into a contract with Wuchang Shipbuilding Industry on design and equipment deliveries for four PSVs of the PX121 design for Otto Offshore. The contract includes an option for four more vessels. (Image: Ulstein)

Ulstein Design & Solutions has entered into a contract with Wuchang Shipbuilding Industry Co., Ltd, China, for the delivery of ship design and equipment for four PX121 type platform supply vessels. The shipowner is the Singapore based Otto Offshore Ltd., who will receive all vessels in 2016. The contract also includes an option for four additional vessels.

These PX121 vessels are capable of supporting offshore activities which are being carried out further from shore and in deeper waters. The vessels can carry flexible loads. In addition to tanks for various contents such as oil, water and drilling fluids, they have four stainless steel tanks for flammable liquids or corrosive chemicals (LFL tanks). The vessels are certified by DNV and carry the ‘Clean Design’ notation.

Measuring 83.4 meters in length and a beam of 18 meters, they have a cargo deck of 840 square meters and a load capacity of 4,000 metric tons (dwt).

Each ship has a maximum speed of approximately 14.5 knots and accommodates 30 people. They carry the X-BOW hull line design, which is efficient on all draughts, a factor critical for PSVs, as they frequently operate with varying draughts. The X-BOW has unique and documented qualities in head seas, in which the bow shape eliminates slamming and reduces bow impact, noise and vibration. This leads to better performance and increased operability, increased crew comfort and safety and reduced fuel consumption. Each ship will be equipped with dynamic positioning system Class II and meets the requirements of Comfort Class.

“We are happy to welcome Wuchang Shipbuilding and Otto Offshore as new customers to Ulstein. The PX121 vessels boast a performance you would normally expect from a larger PSV. Being able to do this at a medium-sized PSV cost, with reduced emissions and fuel consumption, the ship owner gets a favorable combination of two market areas,” stated Sigurd Viseth, managing director in Ulstein Design & Solutions.

Otto Offshore is a company in Otto Marine Ltd. “We are very pleased to partner with Ulstein and Wuchang Shipbuilding for our latest new buildings,” comments Garrick Stanley, Group CEO in Otto Marine. “Ulstein was chosen as the designer for the latest additions to the fleet after careful analysis of the market and our clients’ requirements leading into the future. We look forward to welcoming the four new Ulstein vessels into our fleet in early 2016 to be deployed around the world to the Oil Majors and customers we support.”

The contract with Ulstein includes the deliveries of design, engineering and main equipment. An extensive delivery from Ulstein Power & Control includes integrated control systems, bridge (radio, navigation), switchboard, diesel electric propulsion and frequency converters, and communication systems.

The vessels will be prepared for offshore crane and mezzanine deck for ROV.

ulstein.com
 

  • Image: Ulstein

    Image: Ulstein

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