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Ice Class - Sub-Categories

Ice class sub-category choice - from FSICR (IA/IB/IC/IC Super) to IACS PC1-PC7 - determines ice load + hull power.

Ice classSub-categoryPolar
Recommended class
PC6 / PC7
Formula, assumptions, and limits

Russian Federation RS Arc1-Arc9 equivalent to PC. Baltic FSICR IA = summer only. Polar Code Cat A = PC1-PC5; Cat B = PC6-PC7; Cat C = no ice class.

Symbol legend

SymbolMeaningUnitSource
Polar Class 1-7 - IACS UR I