These guidance notes provide summary information for designers and operators concerning classification requirements for offshore units engaged in installation and / or maintenance activities relating to offshore wind turbines. 

It is intended that for these types of units class notations are assigned in accordance with Part 1 of our Rules and Regulations for the Classification of Offshore Units.

This Guidance Note includes information relating to a number of other aspects which may require development during the design process depending on individual project parameters.

The following types of vessels (WTIVs) are covered by this Guidance Note:

  • Surface-type floating unit;
  • Surface-type self-elevating unit;
  • Self-elevating unit;
  • Column-stabilised unit.