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Monitor Warship Type
A monitor is a relatively small warship that is neither fast nor strongly armored but carries disproportionately large guns. They were used by some navies from the 1860s, during the First World War and with limited use in the Second World War. The original monitor was designed in 1861 by John Ericsson, who named it . Subsequent vessels of this type were accordingly classed as "monitors". They were designed for shallow waters and served as coastal ships. The term also encompassed more flexible breastwork monitors, and was sometimes used as a generic term for any turreted ship. In the early 20th century, the term was revived for shallow-draught armoured shore bombardment vessels, particularly those of the Royal Navy: the s carried guns firing heavier shells than any other warship ever has, seeing action (albeit briefly) against German targets during World War I. The ''Lord Clive'' vessels were scrapped in the 1920s. The term "monitor" also encompasses the strongest of riverine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monitor Model
The input hypothesis, also known as the monitor model, is a group of five hypotheses of second-language acquisition developed by the linguist Stephen Krashen in the 1970s and 1980s. Krashen originally formulated the input hypothesis as just one of the five hypotheses, but over time the term has come to refer to the five hypotheses as a group. The hypotheses are the input hypothesis, the acquisition–learning hypothesis, the monitor hypothesis, the natural order hypothesis and the affective filter hypothesis. The input hypothesis was first published in 1977. The hypotheses put primary importance on the comprehensible input (CI) that language learners are exposed to. Understanding spoken and written language input is seen as the only mechanism that results in the increase of underlying linguistic competence, and language output is not seen as having any effect on learners' ability. Furthermore, Krashen claimed that linguistic competence is only advanced when language is subconsci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS Merrimack (1855)
USS ''Merrimack'', variant spelling ''Merrimac'', was a steam frigate, best known as the hull upon which the ironclad warship CSS ''Virginia'' was constructed during the American Civil War. The CSS ''Virginia'' then took part in the Battle of Hampton Roads (also known as "the Battle of the ''Monitor'' and the ''Merrimack''") in the first engagement between ironclad warships. ''Merrimack'' was the first of six screw frigates (steam frigates powered by screw propellers) begun in 1854. Like others of her class (, , , and ), she was named after a river. The Merrimack originates in New Hampshire and flows through the town of Merrimac, Massachusetts, often considered an older spelling which has sometimes caused confusion of the name.Nelson, J. The Reign of Iron. 2004. After the ship was burned on April 20 1861, it was rebuilt with iron siding in the American Civil War by the Confederacy and renamed the Virginia. History Creation ''Merrimack'' was launched by the Boston ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arc Of Fire
The field of fire or zone of fire (ZF) of a weapon, or group of weapons, is the area around it that can easily and effectively be reached by projectiles from a given position. Field of fire The term originally came from the ''field of fire'' in front of fort A fortification (also called a fort, fortress, fastness, or stronghold) is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime. The term is derived from La ...s (and similar defensive positions), cleared so there was no shelter for an approaching enemy. Sector of fire A similar term sector of fire is used to describe the area into which each gunner or group are ''allowed'' to fire. The boundaries are assigned by the commanding officer and thus can be arbitrary, even three-dimensional (a rifleman attacking a building might be assigned a set of windows to target). Arc of fire The arc of fire of a mounted gun is a horizontal ("Traverse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spar Torpedo
A spar torpedo is a weapon consisting of a bomb placed at the end of a long pole, or spar, and attached to a boat. The weapon is used by running the end of the spar into the enemy ship. Spar torpedoes were often equipped with a barbed spear at the end, so it would stick to wooden Hull (watercraft), hulls. A Fuse (explosives), fuse could then be used to detonate it. Invention Robert Fulton had written about submarine (i.e., subsurface) marine torpedoes in 1810, and experiments were conducted using spar torpedoes that year. Boats carrying spar torpedoes were used during the War of 1812. E. C. Singer, a private engineer who worked on secret projects for the benefit of the Confederate States of America, constructed a spar torpedo during the American Civil War. His torpedo was detonated by means of a trigger mechanism adapted from a rifle lock (see flintlock mechanism for a similar device). The spring-loaded trigger was detonated by means of a long cord attached to the attacking ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS Casco (1864)
The first USS ''Casco'' was the first of a class of twenty 1,175-ton light-draft monitors built by Atlantic Works, Boston, Massachusetts for the Union Navy during the American Civil War. Launch and refitting Upon her launching in May 1864, it was found that the design of these ships was seriously flawed. She was pronounced unseaworthy when nearly completed and on 25 June 1864 she was ordered to be converted to a torpedo vessel, without a turret or heavy guns. ''Casco'' was commissioned 4 December 1864. John Ericsson developed the original design for the ''Casco''-class monitors, but Chief Engineer Alban C. Stimers, the General Inspector of Ironclads, elaborated it. When bids were requested for the ships, Assistant Secretary of the Navy Gustavus Fox wrote to Ericsson to confirm that Stimers had arranged the details with Ericsson's approval. Ericsson replied that he had been kept in the dark and that Stimers had "frittered away" Ericsson's principles, but in March 1863, Fox ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Casco-class Monitor
The ''Casco''-class monitor was a unique class of light draft monitor built on behalf of the United States Navy for the Mississippi theatre during the American Civil War. The largest and most ambitious ironclad program of the war, the project was dogged by delays caused by bureaucratic meddling. Twenty ships of the class were eventually built at great expense, but proved so unseaworthy when trialed that they were quickly sidelined, causing a public scandal. History After the success of the US Navy's first monitor, , in preventing the Confederate ironclad from breaking the Union blockade at Hampton Roads in the spring of 1862, the navy became enthused with the monitor concept (at the expense of the larger broadside ironclad type), and ordered a number of new classes of monitor, one of which was the ''Casco'' class. The ''Casco''s were a unique "light draft" class designed specifically for operating in the shallow bays, rivers, and inlets of the Confederacy. The specifications ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paddle Steamer
A paddle steamer is a steamship or steamboat powered by a steam engine driving paddle wheels to propel the craft through the water. In antiquity, paddle wheelers followed the development of poles, oars and sails, whereby the first uses were wheelers driven by animals or humans. In the early 19th century, paddle wheels were the predominant way of propulsion for steam-powered boats. In the late 19th century, paddle propulsion was largely superseded by the propeller, screw propeller and other marine propulsion systems that have a higher efficiency, especially in rough or open water. Paddle wheels continue to be used by small, pedal-powered paddle boats and by some ships that operate tourist voyages. The latter are often powered by diesel engines. Paddle wheels The paddle wheel is a large steel framework wheel. The outer edge of the wheel is fitted with numerous, regularly spaced paddle blades (called floats or buckets). The bottom quarter or so of the wheel travels under wate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS Roanoke (1855)
USS ''Roanoke'' was a wooden-hulled screw frigate built for the United States Navy in the mid-1850s. She served as flagship of the Home Squadron in the late 1850s and captured several Confederate ships after the start of the American Civil War in 1861. The ship was converted into an ironclad monitor during 1862–63; the first ship with more than two gun turrets in history. Her conversion was not very successful as she rolled excessively, and the weight of her armor and turrets strained her hull. Her deep draft meant that she could not operate off shallow Confederate ports and she was relegated to harbor defense at Hampton Roads, Virginia for the duration of the war. ''Roanoke'' was placed in reserve after the war and sold for scrap in 1883. Description ''Roanoke'' was long between perpendiculars and had a beam of .Canney 1990, p. 174 The ship had a draft of Silverstone, p. 17 and a depth of hold of . She displaced and had a burthen of 3,400 tons. ''Roanoke''s hull was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gothenburg
Gothenburg ( ; ) is the List of urban areas in Sweden by population, second-largest city in Sweden, after the capital Stockholm, and the fifth-largest in the Nordic countries. Situated by the Kattegat on the west coast of Sweden, it is the gubernatorial seat of Västra Götaland County, with a population of approximately 600,000 in the city proper and about 1.1 million inhabitants in Metropolitan Gothenburg, the metropolitan area. Gustavus Adolphus, King Gustavus Adolphus founded Gothenburg by royal charter in 1621 as a heavily fortified, primarily Dutch, trading colony. In addition to the generous privileges given to his Dutch allies during the ongoing Thirty Years' War, e.g. tax relaxation, he also attracted significant numbers of his German and Scottish allies to populate his only town on the western coast; this trading status was furthered by the founding of the Swedish East India Company. At a key strategic location at the mouth of the , where Scandinavia's largest dr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maritiman
Maritiman is a floating maritime museum on the Göta Älv, in Gothenburg, Sweden. The museum's collection comprises 19 vessels, the oldest being HSwMS Sölve, HSwMS ''Sölve'' from 1875. The collection All of the vessels are afloat on the river. The collection includes: *Cargo ship ''Fryken'' *, *Repair ship ''ESAB IV'' *Fireboat ''Flodsprutan II'' *Gothenburg barge *Lightship ''Fladen'' *HSwMS ''Kalmarsund'', minelaying vessel *, *Port ferry ''Dan Broström'' *Port towboat ''Stormprincess'' *, *Towboat ''Herkules'' *HSwMS ''Hugin'', ''Hugin''-class patrol boat See also * , another a maritime museum in Göteborg External linksOfficial website 1985 establishments in Sweden Maritime museums in Sweden Museums established in 1985 Museums in Gothenburg Nordstaden {{Sweden-museum-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norrköping
Norrköping ( , ) is a city in the province of Östergötland in eastern Sweden and the seat of Norrköping Municipality, Östergötland County, about 160 km southwest of the national capital Stockholm, 40 km east of county seat Linköping and 60 km west of the Södermanland capital of Nyköping. The city has a population of 98,229 inhabitants in 2023, out of a municipal total of 144,980,making it Sweden's eleventh largest city and tenth largest municipality. The city is situated by the mouth of the river Motala ström, at Bråviken, an inlet of the Baltic Sea. Water power from the Motala ström and the good harbour were factors that facilitated the rapid growth of this once industrial city, known for its textile industry. It has several nicknames such as: "Sweden's Manchester", " Peking" and "Surbullestan" (Surbulle our bunwas a local nickname for the textile workers, and stan is short for Staden, which means The City or The Town in Swedish). History In 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
