Section 5 Strengthening standard for navigation in ice – Application of requirements

5.1.1 When disconnectable units are required to navigate in ice and additional strengthening is fitted in accordance with the requirements given in this Chapter, an appropriate special features notation will be assigned. It is the responsibility of the Owners to determine which notation is most suitable for their requirements.

5.1.2 For semi-submersible units with twin lower hulls the ice strengthening, as required by this Chapter, is to be carried out to both hulls. Where the exposed deck of the lower hulls is situated below the upper limit of the ice belt, the strengthening of the deck will be subject to special consideration and the deck thickness is not to be less than the shell plating in the main ice belt.

5.1.3 The extent of reinforcement on units of unconventional form will be specially considered.

5.2.1 Plans, calculations and data are to be submitted as required by the relevant Parts of these Rules together with the additional information required by Pt 8 Rules for Ice and Cold Operations of the Rules for Ships.