Oil tanker

An oil tanker, also known as a petroleum tanker, is a merchant ship designed for the bulk transport of oil. There are two basic types of oil tankers: the crude tanker and the product tanker. Crude tankers move large quantities of unrefined crude oil from its point of extraction to refineries. Product tankers, generally much smaller, are designed to move refined products from refineries to points near consuming markets.

Oil tankers are often classified by their size as well as their occupation. The size classes range from inland or coastal tankers of a few thousand metric tons of deadweight (DWT) to the mammoth ultra large crude carriers (ULCCs) of 550,000 DWT. Tankers move approximately 2,000,000,000 metric tons (2.2×10⁹ short tons) of oil every year. Second only to pipelines in terms of efficiency, the average cost of oil transport by tanker amounts to only two or three United States cents per 1 US gallon (3.8 L).

Some specialized types of oil tankers have evolved. One of these is the naval replenishment oiler, a tanker which can fuel a moving vessel. Combination ore-bulk-oil carriers and permanently moored floating storage units are two other variations on the standard oil tanker design. Oil tankers have been involved in a number of damaging and high-profile oil spills. As a result, they are subject to stringent design and operational regulations.

United States Navy

The United States Navy (USN) is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest, most capable navy in the world, with the highest combined battle fleet tonnage. The U.S. Navy has the world's largest aircraft carrier fleet, with ten in service, two in the reserve fleet, and three new carriers under construction. The service has 328,194 personnel on active duty and 101,199 in the Navy Reserve. It has 272 deployable combat vessels and more than 3,700 aircraft in active service as of February 2016.

The U.S. Navy traces its origins to the Continental Navy, which was established during the American Revolutionary War and was essentially disbanded as a separate entity shortly thereafter. It played a major role in the American Civil War by blockading the Confederacy and seizing control of its rivers. It played the central role in the World War II defeat of Japan. The 21st century U.S. Navy maintains a sizable global presence, deploying in such areas as East Asia, the Mediterranean, and the Middle East. It is a blue-water navy with the ability to project force onto the littoral regions of the world, engage in forward areas during peacetime, and rapidly respond to regional crises, making it an active player in U.S. foreign and defense policy.

English Channel

The English Channel (French: la Manche, "the Sleeve"; Breton: Mor Breizh, "Sea of Brittany"; Cornish: Mor Bretannek, "British Sea"), also called simply the Channel, is the body of water that separates southern England from northern France, and joins the southern part of the North Sea to the rest of the Atlantic Ocean. The name "English Channel" is mostly used in English.

It is about 560 km (350 mi) long and varies in width from 240 km (150 mi) at its widest to 32.3 km (20.1 mi) in the Strait of Dover. It is the smallest of the shallow seas around the continental shelf of Europe, covering an area of some 75,000 km² (29,000 sq mi).

Geography

The International Hydrographic Organization defines the limits of the English Channel as follows:

The IHO defines the southwestern limit of the North Sea as "a line joining the Walde Lighthouse (France, 1°55'E) and Leathercoat Point (England, 51°10'N)". The Walde Lighthouse is 6 km east of Calais (50°59′06″N 1°55′00″E / 50.98500°N 1.91667°E / 50.98500; 1.91667), and Leathercoat Point is at the north end of St Margaret's Bay, Kent (51°10′00″N 1°24′00″E / 51.16667°N 1.40000°E / 51.16667; 1.40000).

Singapore

Singapore (ⁱ/ˈsɪŋɡəpɔːr/), officially the Republic of Singapore, and often referred to as the Lion City, the Garden City, and the Red Dot, is a global city in Southeast Asia and the world's only island city-state. It lies one degree (137 km) north of the equator, at the southernmost tip of continental Asia and peninsular Malaysia, with Indonesia's Riau Islands to the south. Singapore's territory consists of the diamond-shaped main island and 62 islets. Since independence, extensive land reclamation has increased its total size by 23% (130 km²), and its greening policy has covered the densely populated island with tropical flora, parks and gardens.

The islands were settled from the second century AD by a series of local empires. In 1819, Sir Stamford Raffles founded modern Singapore as a trading post of the East India Company; after the company collapsed, the islands were ceded to Britain and became part of its Straits Settlements in 1826. During World War II, Singapore was occupied by Japan. It gained independence from Britain in 1963, by uniting with other former British territories to form Malaysia, but was expelled two years later over ideological differences. After early years of turbulence, and despite lacking natural resources and a hinterland, the nation developed rapidly as an Asian tiger economy, based on external trade and its human capital.

Navy

A navy or maritime force is a fleet of waterborne military vessels (watercraft) and its associated naval aviation, both sea-based and land-based. It is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operations and related functions. It includes anything conducted by surface ships, amphibious ships, submarines, and seaborne aviation, as well as ancillary support, communications, training, and other fields; recent developments have included space-related operations. The strategic offensive role of a navy is projection of force into areas beyond a country's shores (for example, to protect sea-lanes, ferry troops, or attack other navies, ports, or shore installations). The strategic defensive purpose of a navy is to frustrate seaborne projection-of-force by enemies. The strategic task of the navy also may incorporate nuclear deterrence by use of Submarine-launched ballistic missiles. Naval operations can be broadly divided between riverine and littoral applications (brown-water navy), open-ocean applications (blue-water navy), and something in between (green-water navy), although these distinctions are more about strategic scope than tactical or operational division.