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The 2012-built South African polar research vessel S. A. Agulhas II is one of the few vessels rated PC 5 or higher.. Polar Class (PC) refers to the ice class assigned to a ship by a classification society based on the Unified Requirements for Polar Class Ships developed by the International Association of Classification Societies (IACS).
The American Bureau of Shipping has a system of ice classes which includes classes A5 through A0; B0, C0, and D0. A5 class is the strongest built of the classes, with D0 being the weakest. All other major classification societies have a similar system of ice classes, and converting between ice classes is relatively easy. In most cases only the ...
The vessels are strengthened for navigation in ice-covered arctic seas according to the Russian Maritime Register of Shipping ice class Arc7. [ 4 ] [ 10 ] They are designed to break ice up to 1.7 metres (5 ft 7 in) thick.
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Authorities initially said the 11-year-old girl was critically injured after she and a 12-year-old boy fell through the ice in Washington Park Lake on Saturday, Dec. 7. ... 4:30 p.m., and the 12 ...
The bollard pull and propulsion power would have to be sufficient to allow continuous operation in level ice with a thickness of 1.5 metres (5 ft) and 10–20-centimetre (4–8 in) snow cover as well as make the vessel capable of opening a 25-metre (82 ft) channel through uniform 1.2 metres (4 ft) ice field at a speed of 6 knots (11 km/h; 6.9 ...