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Avenger Class Mine Countermeasures Ship
''Avenger''-class mine countermeasures ships are a class of 14 ships constructed for the United States Navy from 1987 to 1994, designed to clear naval mine, mines from vital waterways. The ships have the hull classification symbol, hull designator MCM. The ''Avenger''-class ships are being replaced by the Freedom-class littoral combat ship, ''Freedom'' and s, as well as other MCM platforms, which use various unmanned vehicle, unmanned air, surface, and undersea vehicles to detect and destroy naval mines at a standoff distance. History Background In the early 1980s, the U.S. Navy began development of a new Naval mine#Countermeasures, mine countermeasures (MCM) force, which included two new classes of ships and Minesweeper (ship)#Minesweeping aircraft, minesweeping helicopters. The vital importance of a state-of-the-art mine countermeasures force was strongly underscored in the Persian Gulf during the eight years of the Iran–Iraq War, and in Operations Gulf War#Operation Deser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawaii
Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only state not on the North American mainland, the only state that is an archipelago, and the only state in the tropics. Hawaii consists of 137 volcanic islands that comprise almost the entire Hawaiian Islands, Hawaiian archipelago (the exception, which is outside the state, is Midway Atoll). Spanning , the state is Physical geography, physiographically and Ethnology, ethnologically part of the Polynesian subregion of Oceania. Hawaii's ocean coastline is consequently the List of U.S. states and territories by coastline, fourth-longest in the U.S., at about . The eight main islands, from northwest to southeast, are Niihau, Niihau, Kauai, Kauai, Oahu, Oahu, Molokai, Molokai, Lanai, Lānai, Kahoʻolawe, Kahoolawe, Maui, and Hawaii (island), Hawaii, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iran–Iraq War
The Iran–Iraq War, also known as the First Gulf War, was an armed conflict between Iran and Iraq that lasted from September 1980 to August 1988. Active hostilities began with the Iraqi invasion of Iran and lasted for nearly eight years, until the acceptance of United Nations Security Council Resolution 598 by both sides. Iraq's primary rationale for the attack against Iran cited the need to prevent Ruhollah Khomeini—who had spearheaded the Iranian revolution in 1979—from exporting the new Iranian ideology to Iraq. There were also fears among the Iraqi leadership of Saddam Hussein that Iran, a theocratic state with a population predominantly composed of Shia Muslims, would exploit sectarian tensions in Iraq by rallying Iraq's Shia majority against the Baʽathist government, which was officially secular but dominated by Sunni Muslims. Iraq also wished to replace Iran as the power player in the Persian Gulf, which was not seen as an achievable objective prior to the Is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Douglas Fir
The Douglas fir (''Pseudotsuga menziesii'') is an evergreen conifer species in the pine family, Pinaceae. It is the tallest tree in the Pinaceae family. It is native to western North America and is also known as Douglas-fir, Douglas spruce, Oregon pine, and Columbian pine. There are three varieties: coast Douglas-fir (''P. menziesii'' var. ''menziesii''), Rocky Mountain Douglas-fir (''P. menziesii'' var. ''glauca'') and Mexican Douglas-fir (''P. menziesii'' var. ''lindleyana''). Despite its common names, it is not a true fir (genus '' Abies''), spruce (genus '' Picea''), or pine (genus ''Pinus''). It is also not a hemlock; the genus name ''Pseudotsuga'' means "false hemlock". Description Douglas-firs are medium-sized to extremely large evergreen trees, tall (although only coast Douglas-firs reach heights near 100 m) and commonly reach in diameter, although trees with diameters of almost exist. The largest coast Douglas-firs regularly live over 500 years, with the ol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fiberglass
Fiberglass (American English) or fibreglass (English in the Commonwealth of Nations, Commonwealth English) is a common type of fibre-reinforced plastic, fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened into a sheet called a chopped strand mat, or woven into glass cloth. The plastic Matrix (composite), matrix may be a thermoset polymer matrix—most often based on thermosetting polymers such as epoxy, polyester resin, or vinyl ester resin—or a thermoplastic. Cheaper and more flexible than Carbon-fiber-reinforced polymers, carbon fiber, it is stronger than many metals by weight, non-magnetic, non-conductive, transparent to electromagnetic radiation, can be molded into complex shapes, and is chemically inert under many circumstances. Applications include aircraft, boats, automobiles, bath tubs and enclosures, swimming pools, hot tubs, septic tanks, water tanks, roofing, pipes, cladding, orthopedic casts, surfboards, and external door skins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wood
Wood is a structural tissue/material found as xylem in the stems and roots of trees and other woody plants. It is an organic materiala natural composite of cellulosic fibers that are strong in tension and embedded in a matrix of lignin that resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees, or more broadly to include the same type of tissue elsewhere, such as in the roots of trees or shrubs. In a living tree, it performs a mechanical-support function, enabling woody plants to grow large or to stand up by themselves. It also conveys water and nutrients among the leaves, other growing tissues, and the roots. Wood may also refer to other plant materials with comparable properties, and to material engineered from wood, woodchips, or fibers. Wood has been used for thousands of years for fuel, as a construction material, for making tools and weapons, furniture and paper. More recently it emerged as a feedstock for the production ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS Avenger;Shocktrial
USS may refer to: Arts, entertainment, and media * Ubiquitous Synergy Seeker, a Canadian band * Universal Studios Singapore, a theme park in Singapore Businesses and organizations * Union of Sovereign States, the planned successor to the Soviet Union * Union Switch & Signal, a supplier of railroad switching equipment * Union Syndicale Suisse, the Swiss Trade Union Confederation * United Seamen's Service, a non-profit, federally chartered organization founded in 1942 * United State of Saurashtra, a separate, western State within the Union of India from 1948 until 1956 * United States Senate, the upper chamber of the United States Congress * U.S. Steel Corporation * USA Swimming, formerly United States Swimming, the national governing body for competitive swimming in the US * Universities Superannuation Scheme, a pension scheme in the United Kingdom * United Peasant Party (''Ujedinjena seljačka stranka''), a political party in Serbia Computing * Unformatted System Services, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Program Of Iran
The nuclear program of Iran is one of the most scrutinized nuclear programs in the world. The military capabilities of the program are possible through its mass enrichment activities in facilities such as Natanz and Arak. In June 2025, the International Atomic Energy Agency (IAEA) found Iran non-compliant with its nuclear obligations for the first time in 20 years. Iran retaliated by launching a new enrichment site and installing advanced centrifuges. Iran's nuclear program began in the 1950s under the Pahlavi dynasty with US support. It expanded in the 1970s with plans for power reactors, paused after the 1979 Iranian Revolution, and resumed secretly during the 1980s Iran–Iraq War. In the 1990s, Iran pursued a full nuclear fuel cycle and acquired centrifuge technology through illicit networks, including ties with Pakistan and North Korea. Undeclared enrichment sites at Natanz and Arak were exposed in 2002, and Fordow, an underground fuel enrichment site, was reveale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strait Of Hormuz
The Strait of Hormuz ( ''Tangeh-ye Hormoz'' , ''Maḍīq Hurmuz'') is a strait between the Persian Gulf and the Gulf of Oman. It provides the only sea passage from the Persian Gulf to the open ocean and is one of the world's most strategically important choke points. On the north coast lies Iran, and on the south coast lies the Musandam peninsula, shared by the United Arab Emirates and the Musandam Governorate, an exclave of Oman. The strait is about long, with a width varying from about to . A third of the world's liquefied natural gas and almost 25% of total global List of countries by oil exports, oil consumption passes through the strait, making it a highly important strategic location for international trade. It has been so for centuries; its vast hinterlands were rich in luxury trade goods with no easy access to lucrative trading ports. Babur's memoirs recount how almonds had to be carried from the distant Fergana Valley, Ferghana region to Hormuz to reach markets. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manama
Manama ( ', Bahrani Arabic, Bahrani pronunciation: ) is the capital and List of cities in Bahrain, largest city of Bahrain, with an approximate population of 297,502 as of 2012. Long an important trading center in the Persian Gulf, Manama is home to a diverse population. After periods of Portuguese Empire, Portuguese and Persian control and a short invasion from the ruling dynasty of House of Saud, Saudi Arabia, followed by a longer invasion by Oman, Bahrain established itself as an sovereign state, independent nation in 1971 following a period of British hegemony. Manama has a history that spans over several centuries. First mentioned in Islamic texts as early as the 14th century, Manama remained a small trading port until it came under Portuguese Empire, Portuguese control in the early 1500s. In 1602, the Safavid dynasty, Safavid Persians expelled the Portuguese, and Manama became a regional center for commerce and Pearl#Pearl_farming, pearling. By the late 19th century, it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sasebo
is a core city located in Nagasaki Prefecture, Japan. It is the second-largest city in Nagasaki Prefecture, after its capital, Nagasaki. , the city had an estimated population of 230,873 in 102,670 households, and a population density of 540 persons per km2. The total area of the city is . Geography Sasebo is located in the northwestern part of Kyushu, in the northern part of Nagasaki Prefecture, from the base of the Kitamatsuura Peninsula to the central and southern part of the peninsula. It is located about 50 kilometers north-northwest of Nagasaki City (the shortest distance by land is about 60 kilometers). The west, southwest, and southern parts of the city face the sea, and the east borders Saga Prefecture. The city includes the island of Ukujima, at the northern end of the Goto Islands. Although not as steep as Nagasaki City, the city is characterized by many hills. Because the mountains approach the central downtown area in the center of the city, bicycles are not widel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sonar
Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances ( ranging), communicate with or detect objects on or under the surface of the water, such as other vessels. "Sonar" can refer to one of two types of technology: ''passive'' sonar means listening for the sound made by vessels; ''active'' sonar means emitting pulses of sounds and listening for echoes. Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. Acoustic location in air was used before the introduction of radar. Sonar may also be used for robot navigation, and sodar (an upward-looking in-air sonar) is used for atmospheric investigations. The term ''sonar'' is also used for the equipment used to generate and receive the sound. The acoustic frequencies used in sonar systems vary from very low ( infrasonic) to e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
