WINTERIZED ARCTIC (t1, t2)
Ships operating in cold climate environments for longer periods, where t1 = material design temp. in °C, t2 = extreme design temp. in °C
WINTERIZED BASIC
Ships operating in cold climate environments for shorter periods, not necessarily including ice covered waters.
WINTERIZED COLD (t1, t2)
Ships operating in cold climate environments for longer periods, where t1 = material design temp. in °C, t2 = extreme design temp. in °C