Ulstein to deliver designs for four Otto Offshore’s PSVs

Ulstein Design & Solutions has entered into an extensive contract with Wuchang Shipbuilding Industry Co., Ltd, China, on the delivery of ship design & equipment to four PX121 type platform supply vessels.

Ship owner is the Singapore based Otto Offshore Ltd., who will receive all vessels in 2016. The contract also includes an option for four 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 metres in length and a beam of 18 metres, they have a cargo deck of 840 square metres and a load capacity of 4,000 tonnes (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 favourable combination of two market areas,” states 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.