Finnish–Swedish ice class
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Finnish–Swedish ice class is an ice class assigned to a vessel operating in first-year ice in the Baltic Sea and calling at Finnish or Swedish ports. Ships are divided into six ice classes based on re
Product tanker Georg Essberger waiting for icebreaker assistance outside Loviisa in the Gulf of Finland. Its ice class, 1A, fulfilled the minimum requirements of the traffic restrictions at that time and the ship was escorted to port.
Cruiseferries sailing on regular routes between Finland, Sweden and Estonia are usually built to the highest Finnish–Swedish ice class, 1A Super. Due to their high engine power, the cruiseferries do not normally require icebreaker assistance.
When operating alone, pusher Rautaruukki has the same ice class as the integrated tug and barge, 1A Super, but the unpropelled Kalla is downgraded to ice class 3.
Bothnian Sea
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The Bothnian Sea links the Bothnian Bay with the Baltic proper. Kvarken is situated between the two. Together, the Bothnian Sea and Bay make up a larger geographical entity, the Gulf of Bothnia, where
Finnish–Swedish ice class
…and strengthening for navigation in ice during the winter season, which began on 1 December and ended on 16 April in the Gulf of Finland and in the Bothnian Sea, and from 1 November until 1 May in the northern parts of the Gulf of Bothnia. In 1923 a circular about the classification of ice-strengthened ships…
Bothnian Sea at Holmsund in Sweden in September 2004.