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Ships operating in first-year winter ice with pressure ridges could be assigned class notation ICE-05, -10, or -15 where the number indicated nominal ice thickness used for structural design; for example, 0.5 metres (20 in) for ICE-05.
Cargo ship navigating in ice, Gulf of Bothnia Icebreaking bow of the tanker Timofey Guzhenko Ice navigation vessel or Ice-strengthened vessel is a class of ships specially prepared for independent ice navigation in the waters of the polar seas and for following icebreakers in especially difficult ice conditions.
HMS Endurance was an icebreaker that served as the Royal Navy ice patrol ship between 1991 and 2008. Built in Norway as MV Polar Circle , she was chartered by the Royal Navy in 1991 as HMS Polar Circle , before being purchased outright and renamed HMS Endurance in 1992 as a replacement for the previous HMS Endurance whose hull had been weakened ...
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 .
The 2012-built South African polar research vessel S. A. Agulhas II is one of the few vessels rated PC 5 or higher.. Polar Class (PC) refers to the ice class assigned to a ship by a classification society based on the Unified Requirements for Polar Class Ships developed by the International Association of Classification Societies (IACS).
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] [45]
The Skeeter class is divided into sub-classes (A, B and C) all of which are limited to 75 square feet (7.0 m 2) of sail area. [21] A-class boats may be single or two-place tandem with a mast that does not exceed 28.5 feet (8.7 m). They may incorporate carbon fiber construction. [16] B-class boats have seats for two (side by side).
The USCG 65' small harbor tug is a class of fifteen tugs used by the United States Coast Guard for search and rescue, law enforcement, aids-to-navigation work and light icebreaking. The tugs are capable of breaking 18 in (0.46 m) of ice with propulsion ahead and 21 in (0.53 m) of ice backing and ramming. [2]