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Neutrality Patrol
On September 3, 1939, the British and French declarations of war on Germany initiated the Battle of the Atlantic. The United States Navy Chief of Naval Operations (CNO) established a combined air and ship patrol of the United States Atlantic coast, including the Caribbean, on 4 September, President Franklin D. Roosevelt declared the United States' neutrality on 5 September, and declared the naval patrol a Neutrality Patrol.Cressman, p. 2 Roosevelt's initiation of the Neutrality Patrol, which in fact also escorted British ships, as well as orders to U.S. Navy destroyers first to actively report U-boats, then "shoot on sight", meant American neutrality was honored more in the breach than observance. Background Upon declaration of war, the United Kingdom, France, and Germany attempted to restrict their adversaries' ability to import raw materials and manufactured goods. The belligerent navies were deployed to intercept ships capable of carrying such imports. Ships evading enemy nav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vought SBU-1 VS-42 1940 NAN3-90
Vought was the name of several related American aerospace firms. These have included, in the past, Lewis and Vought Corporation, Chance Vought, Vought-Sikorsky, LTV Aerospace (part of Ling-Temco-Vought), Vought Aircraft Companies, and Vought Aircraft Industries. The first incarnation of Vought was established by Chance M. Vought and Birdseye Lewis in 1917. In 1928, it was acquired by United Aircraft and Transport Corporation, which a few years later became United Aircraft Corporation; this was the first of many reorganizations and buyouts. During the 1920s and 1930s, Vought Aircraft and Chance Vought specialized in carrier-based aircraft for the United States Navy, by far its biggest customer. Chance Vought produced thousands of planes during World War II, including the F4U Corsair. Vought became independent again in 1954, and was purchased by Ling-Temco-Vought (LTV) in 1961. The company designed and produced a variety of planes and missiles throughout the Cold War. Vought wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War I
World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting took place mainly in European theatre of World War I, Europe and the Middle Eastern theatre of World War I, Middle East, as well as in parts of African theatre of World War I, Africa and the Asian and Pacific theatre of World War I, Asia-Pacific, and in Europe was characterised by trench warfare; the widespread use of Artillery of World War I, artillery, machine guns, and Chemical weapons in World War I, chemical weapons (gas); and the introductions of Tanks in World War I, tanks and Aviation in World War I, aircraft. World War I was one of the List of wars by death toll, deadliest conflicts in history, resulting in an estimated World War I casualties, 10 million military dead and more than 20 million wounded, plus some 10 million civilian de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aircraft Carrier
An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and hangar facilities for supporting, arming, deploying and recovering carrier-based aircraft, shipborne aircraft. Typically it is the capital ship of a naval fleet, fleet (known as a carrier battle group), as it allows a naval force to power projection, project seaborne naval aviation, air power far from homeland without depending on local airfields for staging area, staging aerial warfare, aircraft operations. Since their inception in the early 20th century, aircraft carriers have evolved from wooden vessels used to deploy individual tethered reconnaissance balloons, to nuclear marine propulsion, nuclear-powered supercarriers that carry dozens of fighter aircraft, fighters, strike aircraft, military helicopters, airborne early warning and control, AEW&Cs and other types of aircraft such as unmanned combat aerial vehicle, UCAVs. While heavier fixed-wing aircraft such as a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Direction Finding
Direction finding (DF), radio direction finding (RDF), or radiogoniometry is the use of radio waves to determine the direction to a radio source. The source may be a cooperating radio transmitter or may be an inadvertent source, a naturally-occurring radio source, or an illicit or enemy system. Radio direction finding differs from radar in that only the direction is determined by any one receiver; a radar system usually also gives a distance to the object of interest, as well as direction. By triangulation, the location of a radio source can be determined by measuring its direction from two or more locations. Radio direction finding is used in radio navigation for ships and aircraft, to locate emergency transmitters for search and rescue, for tracking wildlife, and to locate illegal or interfering transmitters. During the Second World War, radio direction finding was used by both sides to locate and direct aircraft, surface ships, and submarines. RDF systems can be used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cipher
In cryptography, a cipher (or cypher) is an algorithm for performing encryption or decryption—a series of well-defined steps that can be followed as a procedure. An alternative, less common term is ''encipherment''. To encipher or encode is to convert information into cipher or code. In common parlance, "cipher" is synonymous with "code (cryptography), code", as they are both a set of steps that encrypt a message; however, the concepts are distinct in cryptography, especially classical cryptography. Codes generally substitute different length strings of characters in the output, while ciphers generally substitute the same number of characters as are input. A code maps one meaning with another. Words and phrases can be coded as letters or numbers. Codes typically have direct meaning from input to key. Codes primarily function to save time. Ciphers are algorithmic. The given input must follow the cipher's process to be solved. Ciphers are commonly used to encrypt written info ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panama
Panama, officially the Republic of Panama, is a country in Latin America at the southern end of Central America, bordering South America. It is bordered by Costa Rica to the west, Colombia to the southeast, the Caribbean Sea to the north, and the Pacific Ocean to the south. Its capital and largest city is Panama City, whose metropolitan area is home to nearly half of the country's over million inhabitants. Before the arrival of Spanish Empire, Spanish colonists in the 16th century, Panama was inhabited by a number of different Indigenous peoples of Panama, indigenous tribes. It Independence Act of Panama, broke away from Spain in 1821 and joined the Republic of Gran Colombia, a union of Viceroyalty of New Granada, Nueva Granada, Ecuador, and Venezuela. After Gran Colombia dissolved in 1831, Panama and Nueva Granada eventually became the Republic of Colombia. With the backing of the United States, Panama seceded from Colombia in 1903, allowing the construction of the Panama Ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panama Conference (1939)
The Panama Conference was a meeting of the foreign ministers (or equivalents) of all the sovereign nations in North and South America from 23 September to 3 October, 1939, shortly after the beginning of World War II. Its purpose was to establish a common policy for all these nations regarding the war, and in particular naval actions by the nations at war in waters near the Americas. In attendance were the United States, Mexico, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, Panama, Cuba, Haiti, Dominican Republic, Venezuela, Colombia, Ecuador, Peru, Brazil, Paraguay, Bolivia, Chile, Argentina, and Uruguay. Canada did not attend, being considered part of the British Empire and being at war with Germany. The Conference was held in Panama City, Panama. The attending countries jointly issued the Panama Declaration expressing the policies agreed to for maintaining their neutrality. Background US President Franklin D. Roosevelt had sought to increase US influence in L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windward Islands
The Windward Islands are the southern, generally larger islands of the Lesser Antilles of the Caribbean islands or the West Indies. Located approximately between latitudes 10° and 16° N and longitudes 60° and 62° W, they extend from Dominica in the north to Trinidad and Tobago in the south, and lie south of the Leeward Islands and east of Leeward Antilles. The name was also used to refer to a British colony which existed between 1833 and 1960 and originally consisted of the islands of Grenada, Saint Lucia, and Saint Vincent. Today, these islands constitute three sovereign states, the latter of which is now known as Saint Vincent and the Grenadines. The island of Dominica was traditionally considered a part of the Leeward Islands until 1940, when it was transferred from the British Leeward Islands colony to the British Windward Islands. It now composes the fourth sovereign state in the group. Barbados (until 1885) and Tobago (until 1889) were also part of the Brit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leeward Islands
The Leeward Islands () are a group of islands situated where the northeastern Caribbean Sea meets the western Atlantic Ocean. Starting with the Virgin Islands east of Puerto Rico, they extend southeast to Guadeloupe and its dependencies. In English, the term ''Leeward Islands'' refers to the northern islands of the Lesser Antilles chain. The more southerly part of this chain, starting with Dominica, is called the Windward Islands. Dominica was initially considered a part of the Leeward Islands but was transferred from the British Leeward Islands to the British Windward Islands in 1940. Origin of the name The name of this island group, ''Leeward Islands'', dates from previous centuries, when sailing ships were the sole form of transportation across the Atlantic Ocean. In sailing terminology, "windward and leeward, windward" means towards the source of the wind (upwind), while "windward and leeward, leeward" is the opposite direction (downwind). In the West Indies, the prevailin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circle Of Latitude
A circle of latitude or line of latitude on Earth is an abstract east–west small circle connecting all locations around Earth (ignoring elevation) at a given latitude coordinate line. Circles of latitude are often called parallels because they are Parallel (geometry), parallel to each other; that is, planes that contain any of these circles never Intersection, intersect each other. A location's position along a circle of latitude is given by its longitude. Circles of latitude are unlike circles of longitude, which are all great circles with the centre of Earth in the middle, as the circles of latitude get smaller as the distance from the Equator increases. Their length can be calculated by a common sine or cosine function. For example, the 60th parallel north or 60th parallel south, south is half as long as the Equator (disregarding Earth's minor flattening by 0.335%), stemming from \cos(60^) = 0.5. On the Mercator projection or on the Gall-Peters projection, a circle of la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boston
Boston is the capital and most populous city in the Commonwealth (U.S. state), Commonwealth of Massachusetts in the United States. The city serves as the cultural and Financial centre, financial center of New England, a region of the Northeastern United States. It has an area of and a population of 675,647 as of the 2020 United States census, 2020 census, making it the third-largest city in the Northeastern United States after New York City and Philadelphia. The larger Greater Boston metropolitan statistical area has a population of 4.9 million as of 2023, making it the largest metropolitan area in New England and the Metropolitan statistical area, eleventh-largest in the United States. Boston was founded on Shawmut Peninsula in 1630 by English Puritans, Puritan settlers, who named the city after the market town of Boston, Lincolnshire in England. During the American Revolution and American Revolutionary War, Revolutionary War, Boston was home to several seminal events, incl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Declaration Of Panama Map
Declaration may refer to: Arts, entertainment, and media Literature * Declaration (book), ''Declaration'' (book), a self-published electronic pamphlet by Michael Hardt and Antonio Negri * The Declaration (novel), ''The Declaration'' (novel), a 2008 children's novel by Gemma Malley Music * Declaration (The Alarm album), ''Declaration'' (The Alarm album) (1984) * Declaration (Bleeding Through album), ''Declaration'' (Bleeding Through album) (2008) * Declaration (Steven Curtis Chapman album), ''Declaration'' (Steven Curtis Chapman album) (2001) *''Déclaration'', 1973 album by Georges Moustaki * ''The Declaration'', 2008 album by Ashanti *Declaration (Red album), ''Declaration'' (Red album) (2020) Songs *"Declaration (This Is It)", a 2012 gospel song by Kirk Franklin *"Declaration", a song by Killswitch Engage from the album ''The End of Heartache'', 2004 *"Declaration", a song by Trivium from the album ''Ascendancy (album), Ascendancy'', 2005 *"Déclaration", a classical song by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
