Motor ship

A motor ship or motor vessel is a ship propelled by an internal combustion engine, usually a diesel engine. The names of motor ships are often prefixed with MS, M/S, MV or M/V.

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References

General Dynamics Electric Boat

General Dynamics Electric Boat (GDEB) is a subsidiary of General Dynamics Corporation. It has been the primary builder of submarines for the United States Navy for more than 100 years.

The company's main facilities are a shipyard in Groton, Connecticut, a hull-fabrication and outfitting facility in Quonset Point, Rhode Island, and a design and engineering facility in New London, Connecticut.

History

The company was founded in 1899 by Isaac Rice as the Electric Boat Company to build John Philip Holland's submersible designs, which were developed at Lewis Nixon's Crescent Shipyard in Elizabeth, New Jersey. Holland VI was the first submarine that this shipyard built, later renamed USS Holland (SS-1). On 11 April 1900, it became the first modern submarine to be purchased and commissioned into the United States Navy. The success of Holland VI created a demand for follow-up models (A-class or Plunger class) that began with the prototype submersible Fulton built at Electric Boat (EB). Some foreign navies were interested in John Holland's latest submarine designs, and so purchased the rights to build them under licensing contracts through the Electric Boat Company, and these included Great Britain's Royal Navy, Japan's Imperial Japanese Navy, Russia's Imperial Russian Navy, and the Netherlands' Royal Netherlands Navy.

Boat

A boat is a watercraft of any size designed to float or plane, to work or travel on water. Small boats are typically found on inland (lakes) or in protected coastal areas. However, boats such as the whaleboat were designed for operation from a ship in an offshore environment. In naval terms, a boat is a vessel small enough to be carried aboard another vessel (a ship). Another less restrictive definition is a vessel that can be lifted out of the water. Some definitions do not make a distinction in size, as bulk freighters 1,000 feet (300 m) long on the Great Lakes are called oreboats. For reasons of naval tradition, submarines are usually referred to as 'boats' rather than 'ships', regardless of their size and shape.

Boats have a wide variety of shapes, sizes and construction methods due to their intended purpose, available materials or local traditions. Canoe type boats have a long history and various versions are used throughout the world for transportation, fishing or sport. Fishing boats vary widely in style partly to match local conditions. Pleasure boats include ski boats, pontoon boats, and sailboats. House boats may be used for vacationing or long-term housing. Small boats can provide transport or convey cargo (lightering) to and from large ships. Lifeboats have rescue and safety functions. Boats can be powered by human power (e.g., rowboats), wind power (e.g., sailboats) and motor power (e.g., propellor-driven motorboats driven by gasoline or diesel engines).

Electricity

Electricity is the set of physical phenomena associated with the presence and flow of electric charge. Electricity gives a wide variety of well-known effects, such as lightning, static electricity, electromagnetic induction and electric current. In addition, electricity permits the creation and reception of electromagnetic radiation such as radio waves.

In electricity, charges produce electromagnetic fields which act on other charges. Electricity occurs due to several types of physics: