ICE CLASS

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Where additional strengthening is fitted for navigation in ice conditions

an appropriate notation may be assigned. The notations fall into two

groups: those where additional strengthening is added for first-year ice, i.e.

service where waters ice up in winter only; and those where additional

strengthening is added for multi-year ice, i.e. service in Arctic and Antarc-

tic. It is the responsibility of the owner to determine which notation is most

suitable for his requirements.

Notations are:

-

FIRST

YEAR

ICE

Special features notations are:

Ice Class 1As unbroken level ice with thickness of 1 m.

Ice Class 1A unbroken level ice with thickness of 0.8m.

Ice Class 1B unbroken level ice with thickness of 0.6m.

Ice Class 1C unbroken level ice with thickness of 0.4m.

Ice Class 1 D same as 1C but only requirements for strengthening the for-

ward region, the rudder and steering arrangements apply.

-

MULTI

YEAR

ICE

The addition of the term ‘icebreaking’ to the ship type notation, e.g. ‘ice-

breaking tanker’ plus the following special features notation:

Ice Class AC1 Arctic or Antarctic ice conditions equivalent to unbroken

ice with a thickness of 1 m.

Ice Class AC1.5 Arctic or Antarctic ice conditions equivalent to unbroken

ice with a thickness of 1.5 m.

Ice Class AC2 Arctic or Antarctic ice conditions equivalent to unbroken

ice with a thickness of 2 m.

Ice Class AC3 Arctic or Antarctic ice conditions equivalent to unbroken

ice with a thickness of 3 m.

Ships specially designed for icebreaking duties are assigned the ship type

notation ‘icebreaker’ plus the appropriate special features notation for the

degree of ice strengthening provided