Shipbuilding is the construction of ships, which takes place in a specialized facility known as a shipyard. Shipbuilders, also called shipwrights, are workers which specialize in vessel construction and repair. The construction of boats is called boat building. Due to the smaller size and scope of the vessels being produced, boats do not necessarily require the full services of a shipyard but may be built in a boatyard or even smaller private facility.
Block construction is a modern shipbuilding method which involves the assembly of prefabricated sections. Cross-sections of the superstructure are pre-built in a shipyard, taken to the building dock (or slipway,) and then hoisted into position and attached. Some of the more equipped shipyards are able to build equipment and utilities into the blocks, pre-installing pipes, plumbing, and electrical cables. The more components that can be built into the blocks before final assembly, the less effort required once the hull is welded together.
Since the 40s, modern ships have been made of welded steel,beats by dre studio. The first ships produced by this method had problems with inadequate fracture toughness, which let to rare but devastating structural cracks. The development of specialized steel in the 50s has largely eliminated the problem of brittle fracture, although there are still instances due to the unregulated use of grade A and B steel. This problem seems to result when steel with unknown toughness or FATT (fracture appearance transition temperature) is used in side shells. Despite these occasional incidents, most problems with brittle fractures seem to have been eliminated my modern methods and regulation.
Depending on design and materials, vessels reach a point in their lifespan where refitting and repair become impractical or impossible. The demolition of ships is called ship breaking- a process designed to allow materials and components to be reused and recycled. Equipment can often be reused in other ships, and metals (particularly steel) are separated for scrap recycling, with the hulls being discarded in ship graveyards.
The vessel - designed by Washburn & Doughty Executive Vice President and Naval Architect, Bruce Washburn - draws on the knowledge gained by Mr. Washburn as lead architect of 62 vessels designed and built by Washburn & Doughty, including the yard 92-ft and 98-ft Z-Drive Tugs. Twenty-one 92-ft Z-Drive Tugs and three 98-ft Z-Drive Tugs provide towing and escort services between Boston, Massachusetts and Port Arthur, Texas.
The vessel clean underwater lines and two aft Z-Drives create the maneuverability necessary to be a truly versatile harbor tug. Design features include a wide beam to enhance indirect capabilities and stability. A broad bow will evenly distribute the oint-of-contact?load between the tug and the ship.
Because the tug is an in-house design, customers have the flexibility to easily modify the vessel to suit their particular requirements. The vessel is adaptable to any high speed main engines for 4,000-5,000 hp with matching Z-Drive units. The tug has straight line carbon fibber shafts. Customers can specify off-ship fire-fighting, a stern capstan and/or a bow winch.
The vessel can be arranged as a day boat or outfitted for round the clock operations with up to four staterooms for eight crew members. For 24/7 service, the design features a full galley, dining area and head with shower.
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