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The Code sets out regulations for shipping in the polar regions, principally relating to ice navigation and ship design. The international framework aims to protect the two polar regions — the Arctic (north pole region) and Antarctic (south pole region), from maritime risks. [2] The Code entered into force on 1 January 2017. [2] [3] [4]
Ice navigation occurs wherever a waterborne vessel transits through sea ice.One of the more common regions for ice navigation is the Baltic Sea, where vessels visiting the Baltic States will make their way through first year ice in the winter months, often with an icebreaker, or with ice reports, charts and data provided by meteorological offices.
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One of the varieties of ice navigation vessels are double-acting ships. To move through the ice, they use the combined effect of the ice-breaking shape of the ship's stern and the effect of the propellers on the ice. [14] These vessels may have the usual bulbous bow and may be capable of moving in ice only astern. Since ice sailing astern also ...
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In official context and legislation, the ice classes are usually spelled with Roman numerals, e.g. IA. [3] Classification societies may sometimes use somewhat different distinguishing marks for Finnish-Swedish ice classes; for example, 1A Super is defined as Ice Class I AA by the American Bureau of Shipping (ABS) and ICE(1A*) by DNV GL. [4]
Polar-class icebreakers USCGC Polar Star (WAGB-10), USCGC Polar Sea (WAGB-11) are heavy icebreakers operated by the United States Coast Guard (USCG). These cutters, specifically designed for icebreaking, have reinforced hulls, special icebreaking bows, and a system that allows rapid shifting of ballast to increase the effectiveness of their icebreaking.
Celestial navigation is available to Inuit travellers, although the time that navigation technique is available is limited by the variability of night-time through the year and other factors. [3] Cloudy and blizzard conditions and the light of the aurora borealis limit its use. [4] Snow that was kept airborne by the wind, created a type of fog.
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