---

Norway's Siem Offshore has entered into an agreement with Polish firm Remontowa Shipbuilding S.A. for the construction of four dual-fuelled Platform Supply Vessels (PSVs).

The vessels will be of VS 4411 DF design. Siem Offshore has currently two vessels of similar design under construction for delivery in 2014 and 2015, which are contracted long-term with Total E&P Norge AS and AS Norske Shell respectively.

The newly ordered vessels will have dual fuel systems for the use of either liquefied natural gas (LNG) or marine diesel oil (MDO).

"This new series of PSVs for Siem Offshore represents the latest technology within dual-fuelled systems and hull design, to the benefit of lower fuel consumption, lower fuel cost, lower emissions and a better environment," Siem Offshore said.

The vessels will be built to meet the highest requirements for operations on the Norwegian Continental Shelf and are also suited for operations in other geographical areas. They will have an overall length of 89 meters, a beam of 19 metres, a deck area of 970 metres squared (m2) and with a capacity of 5,500 deadweight tonnage (dwt).

In addition to ordinary class notations for PSVs, the vessels shall be built with equipment and class notations for Fire Fighting (Fi-Fi II), Oil Spill Recovery in Emergency Situations (Oilrec) and according to NOFO guidelines, Rescue and Standby Services to Offshore Installations (Standby Vessel) for up to 300 people, and Safe Hose Operation System (SHOS).

The vessels will be built in accordance with Clean Design and Comfort Class criteria and will be prepared for a second fast rescue craft (FRC).

The ships have scheduled deliveries from the third quarter of 2015 to the second quarter of 2016.