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Katmai Bay, namesake of an area of saltwater shoreline in the Katmai National Park and Preserve of Alaska, is the lead ship of a class of icebreaking tugboats designed to have greater multi-mission capabilities than the 110' Calumet-class Harbor Tug (WYTM). The most significant differences include greater horsepower, greater speed, longer range ...
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 ]
The Cherokee class of fleet tugboats, originally known as the Navajo class, were built for the United States Navy prior to the start of World War II. [2] They represented a radical departure from previous ocean-going tug designs, and were far more capable of extended open ocean travel than their predecessors.
The Bay-class tugboat is a class of 140-foot (43 m) icebreaking tugboats of the United States Coast Guard, with hull numbers WTGB-101 through to WTGB-109.. They can proceed through fresh water ice up to 20 inches (51 cm) thick, and break ice up to 3 feet (0.91 m) thick, through ramming.
The Navy built 22 Abnaki-class fleet tugs during World War II. By the mid-1970's even the youngest was thirty years old, and their capabilities were falling behind the size and range of the ships in the fleet. The Navy Ship Characteristics Board considered a plan for an improved fleet ocean tug to replace the Abnaki class in 1967. Project SCB ...
The Naval Large Tugboat is a class of naval tugboat operated by the Royal Canadian Navy. Four Naval Large Tugboats (NLT) are being built by Ocean Industries Inc. of L'Isle-aux-Coudres under the National Shipbuilding Strategy. The first two tugboats will be based at CFB Esquimalt, and last two will be based at CFB Halifax.
At the outbreak of the First World War the Royal Navy owned seven fleet tugs, mainly civilian vessels purchased as required, employed in normal tug duties at naval ports. When war commenced the Admiralty put in train plans to requisition civilian tugs to meet the need for vessels to work as patrol vessels, minesweepers , anti-submarine warfare ...
In 1963 production was started on 5 patrol boats for the South Vietnamese Navy of the PGM-type. Most production since 1964 has concentrated on fishing vessels and tugs. The largest contract awarded to Martinac was for the manufacture of 26 patrol boats for the U.S. Coast Guard of the WPB-type. Production started in early 1966 and was completed ...