9.1.1 The arrangements given in these Rules are intended to mitigate the risks
associated with operating at low temperatures and include a level of failure to maintain
suitable temperatures and the associated equipment and systems. Where an assessment of
the redundancy of winterisation features for each ship system is carried out in addition
to these Rules to determine the effect of low temperatures and icing, and utilising the
procedures adopted in Pt 5, Ch 22 Propulsion and Steering Machinery Redundancy of the Rules and Regulations for the Classification of Ships, July 2022 as a basis,
an additional notation Winterisation WR(t) may be assigned.