Table of correspondence of ice classes

Marine classification societies are independent organizations that set standards for the design, construction, and operation of ships and offshore facilities. They check whether the vessel complies with technical standards and can be operated safely. For example,  RINA Services S.p.A. (Italy),  Bureau Veritas (BV) (France), Russian Maritime Register of Shipping (RS, RMRS),  Russian Classification Society.

Giving the society’s ice class notation to a ship is an important aspect of classification job. In other words, the level of protection that allows it to operate at sea in ice conditions. Ice classes indicate how well a vessel is adapted for operation in frozen waters, whether it is able to overcome ice obstacles without damage to the hull structure. Different classification societies apply their own systems of ice class notations. For example, Russian society RS uses notations ranging from Ice1 to Ice4, as well as Arc4, Arc5, Arc6, Arc7, Arc8 and Arc9, which are applied to vessels operating in extreme weather conditions of the Arctic. In everyday work, it is often necessary to compare the ice classes of different classification societies.

Morwenna Shipping Company operates 26 ice-class tugboats, which are supervised by RS and RINA. The assigned ice classes comply with the rules of classification and construction of marine vessels. The company also has vessels corresponding to the Rc3 and Rc4 classes:

Last year, Morwenna transferred its 44 vessels to the RMRS class. This decision is due to the termination by the Russian Ministry of Transport of agreements with BV and RINA, which previously had the authority to class Russian flagged vessels.

We are adapting the company’s fleet to changing conditions and requirements in order to confidently overcome ice obstacles and conquer routes in the Arctic!