- - - - - - download - - - - - -
The present DNV specification numbered DNV-OSS-201 has divided by the authors into three major chapters. The first chapter provides general info about services offered by DNV class society and relating to the operation of the vessels on the NCS, standing for the Norwegian Continental Shelf; the second chapter of the specification gives the relevant technical design/construction requirements that would applly at the stage of new construction. Finally, the last chapter provides the requirements for proper maintenance of NCS-related classification notations in the phase of operation. The document DNV-OSS-201 covers all NCS related classification services for the such types of offshore facilities as drilling units, storage units, production units, (and their combinations), well intervention and accommodation units; in addition, following types of installed facilities are covered - production plants, well intervention plants, drilling plants, helidecks and cranes. All technical requirements relating to the design and construction, that are provided in the present document, shall be used as a supplement to the relevant Class Requirements of DNV. The methodology of verification described in the present specification would be applicable to the offshore units that fully satisfy the following criteria - being DNV-classed with the minimum classification notation "Drilling Unit" or "Enhanced System", and/or registered with a national maritime administration. The units and installations that were verified to comply with the relevant requirements of the document may be assigned the "Drilling Unit (N)" class notation.