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An icebreaker is a special-purpose ship or boat designed to move and navigate through ice-covered waters, and provide safe waterways for other boats and ships. Although the term usually refers to ice-breaking ships , it may also refer to smaller vessels, such as the icebreaking boats that were once used on the canals of the United Kingdom .
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 .
Canadian Coast Guard ice breaker Pierre Radisson ' s workboat/lifeboat No.2 was repurposed as a training boat/work boat (13D17073) that has been operated by the Maritime Affairs Committee Navy League of Canada – Outaouais Branch since November 1998.
City Ice Boat No. 3, commonly known as Ice Boat No. 3 or just No. 3, was a municipal sidewheel icebreaker built in 1873 to assist in keeping Philadelphia's waterways free of ice during the winter months. The vessel was also used for occasional excursions and other duties through the rest of the year.
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.
USCGC Healy (WAGB-20) is the United States' largest and most technologically advanced icebreaker as well as the US Coast Guard's largest vessel. [1] She is classified as a medium icebreaker by the Coast Guard. [1]
USCGC Mackinaw (WLBB-30) is a 240-foot (73 m) multi-purpose vessel with a primary mission as a heavy Great Lakes icebreaker [3] specifically built for operations on the North American Great Lakes for the United States Coast Guard. [4]
Mackinaw could break through up to 42 inches (1.1 m) of solid "blue" ice and up to 38 to 40 feet (11.6 to 12.2 m) of shattered, heaped-up "windrow" ice. [23] The sides of her hull are protected by an "ice belt" of 1.625-inch-thick (41.3 mm) steel plating up to several feet above her waterline, while her bottom is armored with 1.375-inch-thick ...
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