Kleven Verft in Ulsteinvik, Norway, in cooperation with its sister yard Myklebust Verft, has signed two contracts with Siem Offshore of Kristiansand, Norway, for the delivery of two large and environmentally friendly anchor handling vessels by Vik Sandvik design VS 491 Clean Design.

Siem Offshore already has 6 identical vessels under construction with Kleven Verft and Myklebust Verft The vessels are sophisticated anchor handling vessels with supply capacity (AHTS) by the VS 491 CD design. The contract value is NOK 1,1 billion.

The vessels are 91,0 m of length over all, with a beam of 22,0. Installed power is 19.000 kW (28.000 Hp), capacity on the winch is 550t. Bollard pull is calculated at 300t.

The combination of environmentally friendly design and large capacities make the vessels especially suitable for operations in the North Sea. The accommodation gives space for 60 people.

The hull is strengthened according to ice class Ice C, and may also work in northern waters. Furthermore they are prepared for A-frame and ROV garage.The vessels will be delivered in March and June 2010.

Siem Offshore now has in total 12 contracts with Kleven. In total the two yards in Kleven Maritime has and order book of 31 vessels at a value of NOK 10,5 billion.