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U.S. Navy Operation Windmill
Operation Windmill (OpWml) was the United States Navy's Second Antarctica Developments Project, an exploration and training mission to Antarctica in 1947–1948. This operation was a follow-up to the First Antarctica Development Project known as Operation Highjump. The expedition was commanded by Commander Gerald L. Ketchum, USN, and the flagship of Task Force 39 was the icebreaker USS ''Burton Island''. Missions during Operation Windmill varied including supply activities, helicopter reconnaissance of ice flows, scientific surveys, underwater demolition surveys, and convoy exercises. Malcolm Davis collected live animals, such as penguins and leopard seals, for zoological studies. The icebreaker USS ''Edisto'' (AG-89) sailed on 1 November 1947 for the Panama Canal to rendezvous with the ''Burton Island'' for the expedition.U.S. NAVY SECOND ANTARCTICA DEVELOPMENTS PROJECT, OPERATION WINDMILL, 1947–1948. http://www.south-pole.com/windmill.htm See also *List of Antarctic e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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A windmill is a structure that converts wind power into rotational energy using vanes called sails or blades, specifically to mill grain (gristmills), but the term is also extended to windpumps, wind turbines, and other applications, in some parts of the English speaking world. The term wind engine is sometimes used to describe such devices. Windmills were used throughout the high medieval and early modern periods; the horizontal or panemone windmill first appeared in Persia during the 9th century, and the vertical windmill first appeared in northwestern Europe in the 12th century. Regarded as an icon of Dutch culture, there are approximately 1,000 windmills in the Netherlands today. Forerunners Wind-powered machines may have been known earlier, but there is no clear evidence of windmills before the 9th century. Hero of Alexandria (Heron) in first-century Roman Egypt described what appears to be a wind-driven wheel to power a machine.Dietrich Lohrmann, "Von der östlichen z ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctica
Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of . Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of . Antarctica is, on average, the coldest, driest, and windiest of the continents, and it has the highest average elevation. It is mainly a polar desert, with annual precipitation of over along the coast and far less inland. About 70% of the world's freshwater reserves are frozen in Antarctica, which, if melted, would raise global sea levels by almost . Antarctica holds the record for the lowest measured temperature on Earth, . The coastal regions can reach temperatures over in summer. Native species of animals include mites, nematodes, penguins, seals and tardigrades. Where vegetation o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation Highjump
Operation HIGHJUMP, officially titled The United States Navy Antarctic Developments Program, 1946–1947, (also called Task Force 68), was a United States Navy (USN) operation to establish the Antarctic research base Little America IV. The operation was organized by Rear Admiral Richard E. Byrd, Jr., USN (Ret), Officer in Charge, Task Force 68, and led by Rear Admiral Ethan Erik Larson, USN, Commanding Officer, Task Force 68. Operation HIGHJUMP commenced 26 August 1946 and ended in late February 1947. Task Force 68 included 4,700 men, 13 ships, and 33 aircraft. HIGHJUMP's objectives, according to the U.S. Navy report of the operation, were: # Training personnel and testing equipment in frigid conditions; # Consolidating and extending the United States' sovereignty over the largest practicable area of the Antarctic continent (publicly denied as a goal before the expedition ended); # Determining the feasibility of establishing, maintaining, and utilizing bases in the Antarctic an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerald Ketchum
Rear Admiral Gerald L. Ketchum (5 December 1908 – 22 August 1992) was a career officer in the United States Navy. He served during World War II and the Korean War. He was a recipient of the Silver Star and also participated in four expeditions to Antarctica. Navy career Gerald Lyle Ketchum was born in Bellingham, Washington on 5 December 1908 and graduated from the United States Naval Academy in 1931. World War II During World War II Ketchum was a lieutenant commander and was placed in command of the destroyer USS ''Perkins'' (DD-377) on 1 March 1943. The ''Perkins'' was employed in operations in the waters off New Guinea. On 22 September 1943, during an operation in which his ship was assigned to screen a convoy of landing craft, Ketchum and the ''Perkins'' engaged ten attacking Japanese torpedo planes. Ketchum positioned the ''Perkins'' between the planes and the convoy, and despite being heavily strafed, simultaneously avoided two torpedoes by skillful maneuvering, shot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USCGC Burton Island (WAGB-283)
USS ''Burton Island'' (AG-88) was a United States Navy Wind-class icebreaker that was later recommissioned in the United States Coast Guard as the USCGC ''Burton Island'' (WAGB-283). She was named after an island near the coast of Delaware. Construction ''Burton Island'' was one of the icebreakers designed by Lt Cdr Edward Thiele and Gibbs & Cox of New York, who modeled them after plans for European icebreakers he obtained before the start of World War II. She was the sixth of seven completed ships of the Wind-class of icebreakers operated by the United States Coast Guard. Her keel was laid on 15 March 1946 at Western Pipe and Steel Company shipyards in San Pedro, California, she was launched on 30 April 1946, and commissioned on 28 December 1946 with Commander Gerald L. Ketchum in command. Her hull was of unprecedented strength and structural integrity, with a relatively short length in proportion to the great power developed, a cut away forefoot, rounded bottom, and fore, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malcolm Davis (ornithologist)
Malcolm Davis (1899 – October 4, 1977) was an American ornithologist and bird keeper. Early life Davis was born at Washington, D.C. in 1899. He studied at the University of Maryland, and later graduated from George Washington University with a degree in zoology. During World War I, he served in the Army Signal Corps. Career Davis began working at the National Zoological Park in 1927. He worked his way up to becoming head keeper of the Bird Division. During the course of his work, Davis traveled to every continent to collect specimens, including Antarctica three times. He captured and brought back animals from each place he visited, including megafauna such as a Sumatran tiger and an Indian rhinoceros. He traveled with Richard E. Byrd to survey the Davis Islands, which now bear his name. He brought back live emperor penguins, which were transferred to the National Zoological Park on March 5, 1940. He kept some alive for six years, a record at the time. Davis took part in Ope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USCGC Edisto (WAGB-284)
USS ''Edisto'' (AGB-2) was a in the service of the United States Navy and was later transferred to the United States Coast Guard as USCGC ''Edisto'' (WAGB-284). She was named after Edisto Island, South Carolina. The island is named after the Native American Edisto Band who inhabited the island and the surrounding area. As of 2011 there is a namesake cutter USCGC ''Edisto'' (WPB-1313). The newer ''Edisto'' is a 110-foot and is stationed in San Diego County, California. History Construction ''Edisto'' was one of the icebreakers designed by Lieutenant Commander Edward Thiele and Gibbs & Cox of New York, who modeled them after plans for European icebreakers he obtained before the start of World War II. She was the last of seven completed ships of the of icebreakers operated by the United States Coast Guard. Her keel was laid on May 15, 1945 at Western Pipe and Steel Company shipyards in San Pedro, California, she was launched on December 28, 1946, and commissioned on Mar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Antarctic Expeditions
This list of Antarctic expeditions is a chronological list of expeditions involving Antarctica. Although the existence of a southern continent had been hypothesized as early as the writings of Ptolemy in the 1st century AD, the South Pole was not reached until 1911. Pre-exploration theories * 600 BC – 300 BC – Greek Philosophers theorize Spherical Earth with North and South Polar regions. * 150 AD – Ptolemy published Geographia, which notes Terra Australis Incognita. Pre-19th century * 7th century – Ui-te-Rangiora is claimed to have sighted southern ice fields. * 13th century – Polynesians settle Auckland Islands (50° S) * 1501–1502 – Gonçalo Coelho and Amerigo Vespucci potentially sail to (52° S) * 1522 – Juan Sebastián de El Cano – first circumnavigation Fernando de Magallanes discovers Strait of Magellan (54° S) * 1526 – Francisco de Hoces reportedly blown south from Straits of Magallanes to (56° S) * 1578 – Francis Drake clai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Military Activity In The Antarctic
As Antarctica has never been permanently settled by humans, there has historically been little military activity in the Antarctic as the Antarctic Treaty, which came into effect on June 23, 1961, bans military activity in Antarctica. Military personnel and equipment may only be used for scientific research or any other peaceful purpose (such as delivering supplies) on the continent. The Antarctic Treaty specifically prohibits military activity on land or ice shelves below 60°S. While the use of nuclear weapons is absolutely prohibited, the Treaty does not apply to naval activity within these bounds (in the Southern Ocean) so long as it takes place on the high seas. Notable operations Military forces from many countries have provided support to scientific expeditions and bases in Antarctica. Notable operations and expeditions have included: * Commander James Cook's second voyage (United Kingdom, 1773) * USS ''Vincennes surveys of Antarctica (United States, 1839 and 1840) * In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of Antarctica
The history of Antarctica emerges from early Western theories of a vast continent, known as Terra Australis, believed to exist in the far south of the globe. The term ''Antarctic'', referring to the opposite of the Arctic Circle, was coined by Marinus of Tyre in the 2nd century AD. The rounding of the Cape of Good Hope and Cape Horn in the 15th and 16th centuries proved that ''Terra Australis Incognita'' ("Unknown Southern Land"), if it existed, was a continent in its own right. In 1773, James Cook and his crew crossed the Antarctic Circle for the first time; however, although they discovered nearby islands, they did not catch sight of Antarctica itself. It is believed he was as close as from the mainland. On 27 January 1820, a Russian expedition led by Fabian Gottlieb von Bellingshausen and Mikhail Lazarev discovered an ice shelf at Princess Martha Coast that later became known as the Fimbul Ice Shelf. Bellingshausen and Lazarev became the first explorers to see and officially d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oceanography
Oceanography (), also known as oceanology and ocean science, is the scientific study of the oceans. It is an Earth science, which covers a wide range of topics, including ecosystem dynamics; ocean currents, waves, and geophysical fluid dynamics; plate tectonics and the geology of the sea floor; and fluxes of various chemical substances and physical properties within the ocean and across its boundaries. These diverse topics reflect multiple disciplines that oceanographers utilize to glean further knowledge of the world ocean, including astronomy, biology, chemistry, climatology, geography, geology, hydrology, meteorology and physics. Paleoceanography studies the history of the oceans in the geologic past. An oceanographer is a person who studies many matters concerned with oceans, including marine geology, physics, chemistry and biology. History Early history Humans first acquired knowledge of the waves and currents of the seas and oceans in pre-historic times. Observations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Military In Antarctica
A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. It is typically authorized and maintained by a sovereign state, with its members identifiable by their distinct military uniform. It may consist of one or more military branches such as an army, navy, air force, space force, marines, or coast guard. The main task of the military is usually defined as defence of the state and its interests against external armed threats. In broad usage, the terms ''armed forces'' and ''military'' are often treated as synonymous, although in technical usage a distinction is sometimes made in which a country's armed forces may include both its military and other paramilitary forces. There are various forms of irregular military forces, not belonging to a recognized state; though they share many attributes with regular military forces, they are less often referred to as simply ''military''. A nation's military may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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