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Soviet M-class Submarine
The M-class submarines, also ''Malyutka'' class (russian: Малютка; ''baby'' or ''little one''), were a class of small, single-, or 1½-hulled submarines built in the Soviet Union and used during World War II. The submarines were built in sections so they could easily be transported by rail. The production was centered in the Gorky Shipyard on the Volga River, after which the sections were transported by railway to Leningrad for assembly and fitting out. This was the first use of welding on Soviet submarines. History 1930s to 1940s Submarines of this class were in four series: VI, VI-bis, XII, XV. The number of VI and VI-bis series boats were almost equal. Series XII was a re-developed project with equivalent tactical characteristics. The first series were powered by one diesel engine and one electric motor. Series XV had developed separately with improved characteristics, including the main ballast in light hull and two shafts. These vessels were mainly used by the Blac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Autonomous underwater vehicle, 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 navy, navies, large and small. Military uses include attacking enemy surface ships (merchant and military) or other submarines, and for aircraft carrier protection, Blockade runner, blockade running, Ballistic missile submarine, nuclear deterrence, reconnaissance, conventio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flotilla Leader
A flotilla leader was a warship of late 19th century and early 20th century navies suitable for commanding a flotilla of destroyers or other small warships, typically a small cruiser or a large destroyer (known as a destroyer leader). The flotilla leader provided space, equipment and staff for the flotilla commodore (who typically held the rank of captain), including a wireless room, senior engineering and gunnery officers, and administrative staff to support the officers. Originally, older light or scout cruisers were often used, but in the early 1900s, the rapidly increasing speed of new destroyer designs meant that such vessels could no longer keep pace with their charges. Accordingly, large destroyer designs were produced for use as leaders. As destroyers changed from specialized anti-torpedo boat vessels that operated in squadrons to larger multi-purpose ships that operated alone or as leaders of groups of smaller vessels, and as command and control techniques improved (and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surface-supplied Diving
Surface-supplied diving is diving using equipment supplied with breathing gas using a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. This is different from scuba diving, where the diver's breathing equipment is completely self-contained and there is no link to the surface. The primary advantages of conventional surface supplied diving are lower risk of drowning and considerably larger breathing gas supply than scuba, allowing longer working periods and safer decompression. Disadvantages are the absolute limitation on diver mobility imposed by the length of the umbilical, encumbrance by the umbilical, and high logistical and equipment costs compared with scuba. The disadvantages restrict use of this mode of diving to applications where the diver operates within a small area, which is common in commercial diving work. The copper helmeted free-flow standard diving dress is the version which made com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naissaar
Naissaar ( sv, Nargö; german: Nargen) is an island in Estonia. It is situated in the Gulf of Finland, northwest of the capital city Tallinn, and is administratively part of the Viimsi Parish, Viimsi parish. The island covers an area of . It is long and wide, and lies about from the mainland. The highest point on the island is Kunilamägi, which is above sea level. The island consists predominantly of coniferous forest and piles of stones and boulders. In 2020, the island had a population of 17; in 2011 the island had 35 or so permanent residents and some summer residents. Administratively the island is divided into three villages: Lõunaküla (Storbyn), Tagaküla, Harju County, Tagaküla (Bakbyn), and Väikeheinamaa (Lillängin). Until World War II, the island's native population numbered about 450 people of Estonian Swedes, Estonian-Swedish origin. However, all of the local residents fled from Naissaar to escape the 1944 Soviet invasion of Estonia. During the 1944–1991 S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aegna
Aegna is an Estonian island in the Bay of Tallinn in the Baltic Sea. Administratively it is part of the city of Tallinn, the capital of Estonia and is a sub district of the Kesklinn (City center) district. Geography Aegna island has an area of 3 km2, and can be found off the Viimsi peninsula, around 1.5 km NW of Rohuneeme and 14 km north of Tallinn. It has a 10 km coastline which includes two sandy beaches. The island's highest point is about 13 m above sea level. , Aegna had 16 permanent residents. Attractions Aegna is a popular destination for day and camping trips, and has around 15 km of walking routes. There is also a WDS Aegna Meditation and Development Centre, opened in the summer time. On the island stands the Eerikukivi, a glacial erratic declared '' Protected Natural Monument''. History Aegna's history dates back thousands of years, but the first written accounts of the island go back to 1297, when Danish king Erik Menved prohib ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tallinn Bay
Tallinn Bay ( et, Tallinna laht) is a bay in Estonia on the southern coast of the Gulf of Finland. The Estonian capital city Tallinn is located on the southern coast of the bay. Tallinn Bay itself is divided into several parts: Tallinn Roadstead (), Kopli Bay, Kakumäe Bay and Paljassaare Bay. The islands Naissaar and Aegna border the bay in the north, the Viimsi Peninsula to the east. The shore waters are shallow but deep rapidly. Tallinn Bay has a steep slope, which allows for good water exchange with the waters of the Gulf of Finland. Tallinn Bay is one of the deepest bays in Estonia, max depth is about 100 m.Autorite kollektiiv. 1996. ''Mereleksikon''. Eesti Entsüklopeediakirjastus. lk 419 The Old Town is situated close to the sheltered Tallinn bay, which is a natural harbour and the main passenger port. The Paljassaare Harbour and the Bekker Harbor by the Kopli Bay serve for cargo traffic. There are four public beaches on the coastline: Pirita, Stroomi, Kakumäe and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tallinn
Tallinn () is the most populous and capital city of Estonia. Situated on a bay in north Estonia, on the shore of the Gulf of Finland of the Baltic Sea, Tallinn has a population of 437,811 (as of 2022) and administratively lies in the Harju ''maakond'' (county). Tallinn is the main financial, industrial, and cultural centre of Estonia. It is located northwest of the country's second largest city Tartu, however only south of Helsinki, Finland, also west of Saint Petersburg, Russia, north of Riga, Latvia, and east of Stockholm, Sweden. From the 13th century until the first half of the 20th century, Tallinn was known in most of the world by variants of its other historical name Reval. Tallinn received Lübeck city rights in 1248,, however the earliest evidence of human population in the area dates back nearly 5,000 years. The medieval indigenous population of what is now Tallinn and northern Estonia was one of the last " pagan" civilisations in Europe to adopt Christianit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People's Liberation Army Navy Submarine Force
The People's Liberation Army Navy Submarine Force (PLANSF) is the submarine service of the People's Liberation Army Navy. It consists of all types of submarines in operational service organized into three fleets: the North Sea Fleet, the East Sea Fleet, and the South Sea Fleet. Submarines have long been one of the three focuses of the People's Liberation Army Navy (the other two are aircraft and major surface combatants), and when the decision was made in late 2006 to concentrate on building other principal surface combatants to strengthen the air defense and to further delay the construction of aircraft carriers due to insufficient air cover, submarines will continue to play the lead dominant role in the assault force for the PLAN. Currently, PLANSF operates a fleet of 66 submarines which include nuclear as well as conventional submarines. Its surface branch counterpart is the People's Liberation Army Navy Surface Force. Nuclear-powered ballistic missile submarines The PLA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People's Republic Of China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minelayer
A minelayer is any warship, submarine or military aircraft deploying explosive mines. Since World War I the term "minelayer" refers specifically to a naval ship used for deploying naval mines. "Mine planting" was the term for installing controlled mines at predetermined positions in connection with coastal fortifications or harbor approaches that would be detonated by shore control when a ship was fixed as being within the mine's effective range. Before World War I, mine ships were termed mine planters generally. For example, in an address to the United States Navy ships of Mine Squadron One at Portland, England, Admiral Sims used the term “mine layer” while the introduction speaks of the men assembled from the “mine planters”. During and after that war the term "mine planter" became particularly associated with defensive coastal fortifications. The term "minelayer" was applied to vessels deploying both defensive- and offensive mine barrages and large scale sea mining. " ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Mine
A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, any vessel or a particular vessel type, akin to anti-infantry vs. anti-vehicle mines. Naval mines can be used offensively, to hamper enemy shipping movements or lock vessels into a harbour; or defensively, to protect friendly vessels and create "safe" zones. Mines allow the minelaying force commander to concentrate warships or defensive assets in mine-free areas giving the adversary three choices: undertake an expensive and time-consuming minesweeping effort, accept the casualties of challenging the minefield, or use the unmined waters where the greatest concentration of enemy firepower will be encountered. Although international law requires signatory nations to declare mined areas, precise locations remain secret; and non-complying individ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NMS Sublocotenent Ghiculescu
NMS ''Sublocotenent Ghiculescu'' was a specialized ASW gunboat of the Romanian Navy. Initially built as a French warship in late World War I, she was purchased by Romania in 1920 and fought during World War II, sinking two submarines and one motor torpedo boat. After 1 year of Soviet service, she was returned to Romania and served as a survey vessel until 2002. Construction and specifications ''Sublocotenent Ghiculescu'' was a gunboat of the French ''Friponne'' class. She was built at Arsenal de Brest, being launched in 1917 and commissioned by the French Navy as ''Mignonne'' in 1918. She was sold to Romania in January 1920. Like her sisters, the gunboat displaced between 344 and 443 tons, measuring 62.1 meters in length, with a beam of 7 meters and a deep-load draught of 2.9 meters. Power plant consisted of two Sulzer diesel engines powering two shafts, resulting in an output of 900 hp which gave her a top speed of 15 knots. She had a range of 3,000 nautical miles at 10 knots an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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