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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]
The resulting 64-by-2-foot (19.51 by 0.61 m) gash and bent propeller shaft was repaired at a dry dock in Montreal over a period of 4 months. The summer of 1978 saw another Arctic trip, doing mapping and marine science along the northeastern coast of Greenland.
A shaft equipped with ladder rungs for personnel access. In civil engineering a shaft is an underground vertical or inclined passageway. Shafts are often entered through a manhole and closed by a manhole cover. They are constructed for a number of reasons including: For the construction of a tunnel
A line shaft is a power-driven rotating shaft for power transmission that was used extensively from the Industrial Revolution until the early 20th century. Prior to the widespread use of electric motors small enough to be connected directly to each piece of machinery, line shafting was used to distribute power from a large central power source ...
The Iris-class buoy tenders were constructed after the Mesquite-class buoy tenders. Salvia cost $923,995 to construct and had an overall length of 180 feet (55 m). She had a beam of 37 feet (11 m) and a draft of up to 12 feet (3.7 m) at the time of construction, although this was increased to 14 feet 7 inches (4.45 m) in 1966.
Shaft mining or shaft sinking is the action of excavating a mine shaft from the top down, where there is initially no access to the bottom. [1] Shallow shafts , typically sunk for civil engineering projects, differ greatly in execution method from deep shafts, typically sunk for mining projects.
USCGC Escanaba (WMEC-907) is a United States Coast Guard medium endurance cutter based in Portsmouth, Virginia. [1] Her keel was laid on April 1, 1983, at Robert Derecktor Shipyard Incorporated, Middletown, Rhode Island.
Chitin-glucan complex (CGC) is a copolymer (polysaccharide) that makes up fungal cell walls, consisting of covalently-bonded chitin and branched 1,3/1,6-ß-D-glucan. CGCs are alkaline-insoluble. Different species of fungi have different structural compositions of chitin and β-glucan making up the CGCs in their cell walls. [1]