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This is a list of icebreakers and other special icebreaking vessels (except cargo ships and tankers) capable of operating independently in ice-covered waters. Ships known to be in service are presented in bold .
Yermak assisting the stranded warship Apraxin, 1900 1976 Soviet postage stamp honoring the Yermak. An earlier vessel, the schooner Yermak, was commissioned for the 1862 attempt to find the Yenissei river delta by Paul Theodor von Krusenstern, by navigating from Murmansk through the Kara Sea to the destination, but unfortunately was shipwrecked before obtaining success.
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 6-metre (20 ft) wide ice belt, where the hull plating was over 50 millimetres (2.0 in) thick in the bow, was designed to withstand ice pressures of up to 1,000 tonnes per square meter (about 1,400 psi), more than 30 to 60 times as much as normal merchant ships at the time.
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.
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Lenin on a 1958 stamp. Lenin (Russian: Ленин) is a Soviet nuclear-powered icebreaker, the first nuclear-powered icebreaker in the world.Launched in 1957, it is both the world's first nuclear-powered surface ship [2] and the first nuclear-powered civilian vessel.
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