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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 ...
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 ...
Ordnance crest "WHAT'S IN A NAME" - military education about SNL. This is a historic (index) list of United States Army weapons and materiel, by their Standard Nomenclature List (SNL) group and individual designations — an alpha-numeric nomenclature system used in the United States Army Ordnance Corps Supply Catalogues used from about 1930 to about 1958.
Unlike the tankers, the Arc7 ice class ship was designed to have excellent icebreaking capability, 2 knots in level ice with a thickness of 1.5 meters, both ahead and astern. The ship, Norilskiy Nickel , was delivered from Hietalahti shipyard in 2006 and performed beyond expectations during ice trials in the Yenisei Gulf . [ 18 ]
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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.. Ships of the highest Finnish-Swedish ice class, 1A Super, are designed to operate in difficult ice conditions mainly without icebreaker assistance while ships of lower ice classes 1A, 1B and 1C are assumed to rely on icebreaker ...
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The vessel was then left to drift in the pack ice for a year and dubbed "Ice Station SHEBA". [ 14 ] [ 23 ] Pierre Radisson participated in Operation Nanook in 2008 and 2009, annual joint training exercises with elements of the Canadian Forces to conduct sovereignty and disaster patrols in the Canadian Arctic. [ 24 ]