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Although icebreaking cargo ships had been built in the past, their hull forms were always compromises between open water performance and icebreaking capability. A good icebreaking bow, designed to break the ice by bending it under the ship's weight, has very poor open water characteristics and is subjected to slamming in heavy weather. However ...
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 .
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.
In addition to her ice-breaking duties, the Mackinaw also serves as an Aids-to-Navigation ship, since she is able to perform the same duties as the Seagoing Buoy Tenders (WLB) of the Coast Guard fleet. Further, she can conduct law enforcement and search-and-rescue missions and can deploy an oil-skimming system to respond to oil-spill situations ...
USCGC Katmai Bay (WTGB-101) is a United States Coast Guard Cutter, and the lead ship of the Bay-class of icebreaking tugboats.At 140 ft (43 m), she is designed to have greater multi-mission capabilities than the 110' Calumet-class Harbor Tug (WYTM).
[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 ...
Her ice class, ABS A3, indicates that she is strengthened for navigation in polar ice conditions with the presence of multiyear ice floes. Furthermore, the notation "Ice Breaker" states that she is designed and constructed for breaking ice to open navigable channels for other ships. [1] [46]
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.