|
U-20-class Submarine
The ''U-20'' class was a class of four submarines or U-boats built for and operated by the Austro-Hungarian Navy (german: Kaiserliche und Königliche Kriegsmarine or ) during World War I. The class is sometimes referred to as the ''Havmanden'' class because it was based upon the design of the Royal Danish Navy's 1911 s, three of which were built in Fiume. With a small fleet of six U-boats at the beginning of World War I, two of which were not operational, the Austro-Hungarian Navy acted to bolster its fleet. They reluctantly ordered four ''U-20'' boats in 1915 because construction could start immediately, even though the ''Havmanden''-class design was largely obsolete by the beginning of the war. Political considerations caused the order to be split between Austrian and Hungarian firms, which contributed to construction problems and delays, keeping any of the boats from being operational until the middle of 1917. The class boats were just over long and were armed with two fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SM U-21 (Austria-Hungary)
SM ''U-21'' or ''U-XXI'' was a or U-boat built for and operated by the Austro-Hungarian Navy (german: Kaiserliche und Königliche Kriegsmarine or ) during the First World War. The design for ''U-21'' was based on submarines of the Royal Danish Navy's ''Havmanden'' class (three of which had been built in Austria-Hungary), and was largely obsolete by the beginning of the war. ''U-21'' was just over long and was armed with two bow torpedo tubes, a deck gun, and a machine gun. Construction on ''U-21'' began in mid 1915 and the boat was launched in September 1916. After suffering damage during a diving trial in January 1917, ''U-21'' underwent seven months of repairs before her commissioning in August 1917. The U-boat conducted patrols off the Albanian coast in October 1917, but experienced the failure of the seal on her main hatch. The repairs kept the boat out of action until June 1918. But in July a piston in her diesel engine broke, knocking the submarine out of the rest o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Whitehead
Robert Whitehead (3 January 1823 – 14 November 1905) was an English engineer who was most famous for developing the first effective self-propelled naval torpedo. Early life He was born in Bolton, England, the son of James Whitehead, a cotton-bleacher, and his wife Ellen Whitehead née Swift. He trained as an engineer and draughtsman, and attended the Mechanics' Institute, Manchester. His first professional employment was at a shipyard in Toulon, France, for Philip Taylor & Sons, and then as a consultant engineer in Milan, Italy. He then moved to Trieste, on the Adriatic coast of Austria. Whitehead's work in Trieste was noticed by the owners of ''Fonderia Metalli'', a metal foundry in the nearby city of Fiume (today Rijeka, Croatia). In 1856, Whitehead became manager of the company, and changed its name to ''Stabilimento Tecnico di Fiume'' (STF). STF produced marine steam boilers and engines, which were the most modern products of that era. The Austrian Navy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theresian Military Academy
The Theresian Military Academy (german: Theresianische Militärakademie, TherMilAk) is a military academy in Austria, where the Austrian Armed Forces train their officers. Founded in 1751, the academy is located in the castle of Wiener Neustadt in Lower Austria. History The Theresian Military Academy (known as the Theresianum) is one of the oldest military academies in the world (the oldest is the Military Academy of Modena). It was founded on 14 December 1751 by Maria Theresa of Austria, who gave the first commander of the Academy, Field marshal Leopold Joseph von Daun (Count Daun), the order ''Mach er mir tüchtige Officier und rechtschaffene Männer daraus'' ("Make me hard working officers and honest men"). Per year, the Academy accepted 100 noblemen and 100 commoners to start their education there. In 1771, Fieldmarshal Lieutenant Hannig published the official studying plan, and in 1775, Maria Theresa published the Academy Rules. At this time, it took 11 years to complet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Salvage
Marine salvage is the process of recovering a ship and its cargo after a shipwreck or other maritime casualty. Salvage may encompass towing, re-floating a vessel, or effecting repairs to a ship. Today, protecting the coastal environment from spillage of oil or other contaminants is a high priority. Before the invention of radio, salvage services would be given to a stricken vessel by any ship that happened to be passing by. Nowadays, most salvage is carried out by specialist salvage firms with dedicated crew and equipment. The legal significance of salvage is that a successful salvor is entitled to a reward, which is a proportion of the total value of the ship and its cargo. The amount of the award is determined subsequently at a "hearing on the merits" by a maritime court in accordance with Articles 13 and 14 of the International Salvage Convention of 1989. The common law concept of salvage was established by the English Admiralty Court, and is defined as "a voluntary succe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trieste
Trieste ( , ; sl, Trst ; german: Triest ) is a city and seaport in northeastern Italy. It is the capital city, and largest city, of the autonomous region of Friuli Venezia Giulia, one of two autonomous regions which are not subdivided into provinces. Trieste is located at the head of the Gulf of Trieste, on a narrow strip of Italian territory lying between the Adriatic Sea and Slovenia; Slovenia lies approximately east and southeast of the city, while Croatia is about to the south of the city. The city has a long coastline and is surrounded by grassland, forest, and karstic areas. The city has a subtropical climate, unusual in relation to its relatively high latitude, due to marine breezes. In 2022, it had a population of about 204,302. Capital of the autonomous region of Friuli Venezia Giulia and previously capital of the Province of Trieste, until its abolition on 1 October 2017. Trieste belonged to the Habsburg monarchy from 1382 until 1918. In the 19th century t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ship Commissioning
Ship commissioning is the act or ceremony of placing a ship in active service and may be regarded as a particular application of the general concepts and practices of project commissioning. The term is most commonly applied to placing a warship in active duty with its country's military forces. The ceremonies involved are often rooted in centuries-old naval tradition. Ship naming and launching endow a ship hull with her identity, but many milestones remain before she is completed and considered ready to be designated a commissioned ship. The engineering plant, weapon and electronic systems, galley, and other equipment required to transform the new hull into an operating and habitable warship are installed and tested. The prospective commanding officer, ship's officers, the petty officers, and seamen who will form the crew report for training and familiarization with their new ship. Before commissioning, the new ship undergoes sea trials to identify any deficiencies needing c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keel Laying
Laying the keel or laying down is the formal recognition of the start of a ship's construction. It is often marked with a ceremony attended by dignitaries from the shipbuilding company and the ultimate owners of the ship. Keel laying is one of the four specially celebrated events in the life of a ship; the others are launching, commissioning and decommissioning. In earlier times, the event recognized as the keel laying was the initial placement of the central timber making up the backbone of a vessel, called the keel. As steel ships replaced wooden ones, the central timber gave way to a central steel beam. Modern ships are most commonly built in a series of pre-fabricated, complete hull sections rather than around a single keel. The event recognized as the keel laying is the first joining of modular components, or the lowering of the first module into place in the building dock. It is now often called "keel authentication", and is the ceremonial beginning of the ship's li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
U-20
U20 or U-20 may refer to: Naval vessels * * , a sloop of the Royal Navy * , a submarine of the Austro-Hungarian Navy Other uses * Great truncated cuboctahedron * Meizu U20, a smartphone * Roland U-20, a synthesizer * Small nucleolar RNA SNORD20 * U20 summit, an international summit for cities from the G-20 countries * Under-20 athletics Junior is a category of athletics in which athletes compete under the age of 20 years. Countries all around the world compete in athletics. World Junior Athletics Competitions are held every two years which contain the best junior competitors in ... * Uppland Runic Inscription 20 {{Letter-NumberCombDisambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tagliamento
The Tagliamento () is a braided river in north-east Italy, flowing from the Alps to the Adriatic Sea at a point between Trieste and Venice. The Tagliamento river is considered as the last morphologically intact river in the Alps. (Its course has not been altered by human intervention). For this reason, it has been the subject of many scientific investigations into its peculiar characteristics: these include its 150 km long corridor which connects the Alps and the Adriatic Sea, its unconstrained floodplain, which hosts several aquatic and terrestrial habitats, and its over 600 islands. The source is in the Mauria Pass, on the border between the regions of Veneto and Friuli-Venezia Giulia. In the upper section, it flows through the historic Carnia region, in the northern part of the province of Udine. In the middle and lower sections, it first sets the boundary between the provinces of Province of Udine, Udine and Province of Pordenone, Pordenone and later betwe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead Ship
The lead ship, name ship, or class leader is the first of a series or class of ships all constructed according to the same general design. The term is applicable to naval ships and large civilian vessels. Large ships are very complex and may take as many as five to ten years to build. Improvements based on experience with building and operating the lead ship are likely to be incorporated into the design or construction of later ships in the class, so it is rare to have vessels that are identical. The second and later ships are often started before the first one is completed, launched and tested. Nevertheless, building copies is still more efficient and cost-effective than building prototypes, and the lead ship will usually be followed by copies with some improvements rather than radically different versions. The improvements will sometimes be retrofitted to the lead ship. Occasionally, the lead ship will be launched and commissioned for shakedown testing before following ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Straits Of Otranto
The Strait of Otranto ( sq, Ngushtica e Otrantos; it, Canale d'Otranto; hr, Otrantska Vrata) connects the Adriatic Sea with the Ionian Sea and separates Italy from Albania. Its width at Punta Palascìa, east of Salento is less than . The strait is named after the Italian city of Otranto. History Since ancient times, the Strait of Otranto was of vital strategic importance. The Romans used it to transport their troops eastwards. The legions marched to Brundisium (now Brindisi), had only a one-day sea voyage to modern Albania territory and then could move eastwards following the Via Egnatia. World War I During World War I, the strait was of strategic significance. The Allied navies of Italy, France, and Great Britain, by blockading the strait, mostly with light naval forces and lightly armed fishing vessels known as drifters, hindered the cautious Austro-Hungarian Navy from freely entering the Mediterranean Sea, and effectively kept them out of the naval theatre of war. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paravane (weapon)
The paravane , a form of towed underwater "glider" with a warhead that was used in anti-submarine warfare, was developed from 1914–16 by Commander C. Vivian Usborne and Lieutenant C. Dennistoun Burney, funded by Sir George White, founder of the Bristol Aeroplane Company. It was used against naval mines and submarines. Usage Initially developed to destroy naval mines, the paravane is strung out and streamed alongside the towing ship, often from the bow, but in many WWII applications aboard minesweepers, the paravane was towed from the stern. The wings of the paravane pull it away laterally from the towing ship, placing a tension on the tow cable. If the tow cable snags the cable anchoring a mine then the anchoring cable is cut by jaws on the paravane, allowing the mine to float to the surface, where it is destroyed by gunfire. If the anchor cable fails to part, the mine and the paravane are brought together and the mine explodes against the paravane. The cable can then b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Marine Salvage")
_underway_2009.jpg "Click for more on -> Ship Commissioning")
.jpg "Click for more on -> Paravane (weapon)")