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Armor Level Protection Class 1 9×18mm Makarov 7.62×38mmR: This armor would protect against five hits, fired from 5 meters, of: 5.9 g (91 gr) 9×18mm Makarov 57-N-181S steel-core bullets at a velocity of 305–325 m/s (1000–1066 ft/s) 6.8 g (105 gr) 7.62×38mmR 57-N-122 lead core bullets at a velocity of 275–295 m/s (902–968 ft/s). Class 2
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 ...
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 ...
[6] [20] [28] This will allow the PSCs to break ice with a thickness between 6 and 8 feet (1.8 and 2.4 m). [4] Designed according to the International Association of Classification Societies (IACS) Unified Requirements for Polar Class Ships , the PSCs will be strengthened to Polar Class 2 which is intended for vessels operating year-round in ...
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Eastwind was the second of five Wind-class of icebreakers built for the United States Coast Guard. Her keel was laid down on 23 June 1942 at Western Pipe and Steel Company shipyards in San Pedro . She was launched on 6 February 1943 and commissioned on 3 June 1944.