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Prior to ocean-going ships, ice breaking technology was developed on inland canals and rivers using laborers with axes and hooks. The first recorded primitive icebreaker ship was a barge used by the Belgian town of Bruges in 1383 to help clear the town moat.
The 42,000 DWT tankers, capable of breaking ice with a thickness of 1.4 metres (4.6 ft) at 3.5 knots (6.5 km/h; 4.0 mph), will be used to transport crude oil from the Novy Port oil fields in the Gulf of Ob to the ice-free port of Murmansk.
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.
An icebreaker is a brief facilitation exercise intended to help members of a group begin the process of working together or forming a team.They are commonly presented as games to "warm up" a group by helping members get to know each other and often focus on sharing personal information such as names or hobbies.
Nuclear icebreaker Yamal, 2015. A nuclear-powered icebreaker is an icebreaker with an onboard nuclear power plant that produces power for the vessel's propulsion system. . Although more expensive to operate, nuclear-powered icebreakers provide a number of advantages over their diesel-powered counterparts, especially along the Northern Sea Route where diesel-powered icebreaker operations are ...
Their stern was similarly shaped to facilitate breaking ice while backing down. The sides of the icebreaker were rounded, with marked tumblehome, that enabled the ship to break free from ice by heeling from side to side. Such heeling was accomplished by shifting water rapidly from wing tanks on one side of the ship to the other.
Kontio is a Finnish state-owned icebreaker.Built by Wärtsilä Helsinki shipyard in 1987 as a replacement for the aging Karhu-class icebreakers, she and her sister ship Otso were the first Finnish post-war icebreaker to be built without bow propellers.
[26] [27] With a total propulsion power of 60 megawatts (80,000 hp), Chukotka is designed to be capable of breaking 2.8 metres (9 ft) thick level ice at a continuous speed of 1.5–2 knots (2.8–3.7 km/h; 1.7–2.3 mph) at full power when operating in deep water at design draught.