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American Holland-class Submarine
The American Holland-class submarines, also AG class or A class, were Holland 602 type submarines used by the Imperial Russian and Soviet Navies in the early 20th century. The small submarines participated in the World War I Baltic Sea and Black Sea theatres and a handful of them also saw action during World War II. Development The AG type was designed by John Philip Holland at Electric Boat Company. The design was known as Holland 602GF/602L,Тип "АГ" (Американский Голланд) ' '' [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diesel-electric Submarine
A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely operated vehicles and robots, as well as medium-sized or smaller vessels, such as the midget submarine and the wet sub. Submarines are referred to as ''boats'' rather than ''ships'' irrespective of their size. Although experimental submarines had been built earlier, submarine design took off during the 19th century, and they were adopted by several navies. They were first widely used during World War I (1914–1918), and are now used in many navies, large and small. Military uses include attacking enemy surface ships (merchant and military) or other submarines, and for aircraft carrier protection, blockade running, nuclear deterrence, reconnaissance, conventional land attack (for example, using a cruise missile), and covert insertion of spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trans-Siberian Railroad
The Trans-Siberian Railway (TSR; , , ) connects European Russia to the Russian Far East. Spanning a length of over , it is the longest railway line in the world. It runs from the city of Moscow in the west to the city of Vladivostok in the east. During the period of the Russian Empire, government ministers—personally appointed by Alexander III and his son Nicholas II—supervised the building of the railway network between 1891 and 1916. Even before its completion, the line attracted travelers who documented their experiences. Since 1916, the Trans-Siberian Railway has directly connected Moscow with Vladivostok. , expansion projects remain underway, with connections being built to Russia's neighbors (namely Mongolia, China, and North Korea). Additionally, there have been proposals and talks to expand the network to Tokyo, Japan, with new bridges that would connect the mainland railway through the Russian island of Sakhalin and the Japanese island of Hokkaido. Route descript ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wrangel's Fleet
Wrangel's Fleet was the last remnant of the Black Sea Fleet of the Imperial Russian Navy and existed from 1920 until 1924. This squadron was a "White" (anti-communist and anti-revolutionary) unit during the Russian Civil War. It was known also as the Russian Squadron (Русская Эскадра). History In 1919, according to Peter Kenez, "Denikin acquired his naval fleet also with the aid of his foreign friends: he claimed the Russian Black Sea Fleet, which at the end of the war came into the possession of the British and French. Two minesweepers which the French gave in January 1919 became the beginning of the White navy." In 1920 the last remnants of the former Denikin's forces were confined to the Crimean Peninsula and commanded by Pyotr Nikolayevich Wrangel. In November 1920 the Bolsheviks captured the White position and the White forces evacuated to Turkey. The fleet was re-organised under the command of Rear Admiral Mikhail Alexandrovich Kedrov and was granted asylum b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ukrainian State
The Ukrainian State ( uk, Українська Держава, translit=Ukrainska Derzhava), sometimes also called the Second Hetmanate ( uk, Другий Гетьманат, translit=Druhyi Hetmanat, link=no), was an anti-Bolshevik government that existed on most of the modern territory of Ukraine (except for Western Ukraine) from 29 April to 14 December 1918. It was installed by German military authorities after the socialist-leaning Central Council of the Ukrainian People's Republic was dispersed on 28 April 1918. Ukraine turned into a provisional dictatorship of Hetman of Ukraine Pavlo Skoropadskyi, who outlawed all socialist-oriented political parties, creating an anti-Bolshevik front with the Russian State. It collapsed in December 1918, when Skoropadskyi was deposed and the Ukrainian People's Republic returned to power in the form of the Directorate. Geography The country lay in Eastern Europe along the middle and lower sections of the Dnieper on the coast of the B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Revolution Of 1917
The Russian Revolution was a period of political and social revolution that took place in the former Russian Empire which began during the First World War. This period saw Russia abolish its monarchy and adopt a socialist form of government following two successive revolutions and a bloody civil war. The Russian Revolution can also be seen as the precursor for the other European revolutions that occurred during or in the aftermath of WWI, such as the German Revolution of 1918. The Russian Revolution was inaugurated with the February Revolution in 1917. This first revolt focused in and around the then-capital Petrograd (now Saint Petersburg). After major military losses during the war, the Russian Army had begun to mutiny. Army leaders and high ranking officials were convinced that if Tsar Nicholas II abdicated, the domestic unrest would subside. Nicholas agreed and stepped down, ushering in a new government led by the Russian Duma (parliament) which became the Russian Prov ... [...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 navigation, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fessenden Transducer
A Fessenden oscillator is an electro-acoustic transducer invented by Reginald Fessenden, with development starting in 1912 at the Submarine Signal Company of Boston. It was the first successful acoustical echo ranging device. Similar in operating principle to a dynamic voice coil loudspeaker, it was an early kind of transducer, capable of creating underwater sounds and of picking up their echoes. The creation of this device was motivated by the RMS ''Titanic'' disaster of 1912, which highlighted the need to protect ships from collisions with icebergs, obstacles, and other ships. Because of its relatively low operating frequency, it has been replaced in modern transducers by piezoelectric devices. Oscillator The ''oscillator'' in the name referred to the fact that the device vibrated and moved water in response to a driving AC current. It was not an electronic oscillator but a mechanical one in that it generated repetitive mechanical vibrations. Electronic oscillators did not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British H-class Submarine
The British H-class submarines were Holland 602 type submarines used by the Royal Navy. The submarines constructed for the British Royal Navy between 1915 and 1919 were designed and built in response to German boats which mined British waters and sank coastal shipping with ease owing to their small size. The H class was created to perform similar operations in German waters, and to attack German submarines operating in British waters. Despite their cramped size and lack of a deck gun on some submarines, the class was popular amongst submariners, and saw action all around the British Isles, some being transferred as far as the Adriatic. Owing to the late arrival of most of the class, they were unable to have much impact in service, only destroying two German submarines and for the loss of four of their own number. Post-war, many were retained in the Royal Navy for training purposes, while four more were lost in accidents during the 1920s. At the outbreak of the Second Worl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ukraine
Ukraine ( uk, Україна, Ukraïna, ) is a country in Eastern Europe. It is the second-largest European country after Russia, which it borders to the east and northeast. Ukraine covers approximately . Prior to the ongoing Russian invasion, it was the eighth-most populous country in Europe, with a population of around 41 million people. It is also bordered by Belarus to the north; by Poland, Slovakia, and Hungary to the west; and by Romania and Moldova to the southwest; with a coastline along the Black Sea and the Sea of Azov to the south and southeast. Kyiv is the nation's capital and largest city. Ukraine's state language is Ukrainian; Russian is also widely spoken, especially in the east and south. During the Middle Ages, Ukraine was the site of early Slavic expansion and the area later became a key centre of East Slavic culture under the state of Kievan Rus', which emerged in the 9th century. The state eventually disintegrated into rival regional po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mykolaiv
Mykolaiv ( uk, Миколаїв, ) is a List of cities in Ukraine, city and List of hromadas of Ukraine, municipality in Southern Ukraine, the Administrative centre, administrative center of the Mykolaiv Oblast. Mykolaiv city, which provides Ukraine with access to the Black Sea, is the location of the most downriver bridge crossing of the Southern Bug river. This city is one of the main shipbuilding centers of the Black Sea. Aside from three shipyards within the city, there are a number of research centers specializing in shipbuilding such as the State Research and Design Shipbuilding Center, Zoria-Mashproekt and others. As of 2021, the city has a population of Mykolaiv holds the honorary title Hero City of Ukraine. The city serves as a transportation hub for Ukraine, containing a sea port, commercial port, river port, highway, Junction (rail), railway junction, and airport. Much of Mykolaiv's land area consists of Park, parks. Park Peremohy (''Victory'') is a large park on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marti Yard
The Black Sea Shipyard ( uk, Чорноморський суднобудівний завод; russian: Черноморский судостроительный завод) is a shipbuilding facility in Mykolaiv, Ukraine, on the southern tip of the of Mykolaiv peninsula. It was founded in 1895 by Belgian interests and began building warships in 1901. At the beginning of World War I in 1914, it was one of the largest industrial facilities in the Russian Empire. The shipyard was moribund until the Soviets began building up the fleet in the 1930s and it began building surface warships as well as submarines. The yard was badly damaged during World War II and took several years to be rebuilt. Surface warship construction temporarily ended in the mid-1950s before being revived in the mid-1960s and submarines were last built in the yard in late 1950s. The Black Sea Shipyard built all of the aircraft carrying ships of the USSR and Russia and continued before the 2022 Russian invasion of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
