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Russian Submarine Pantera (K-317)
The K-317 ''Pantera'' is an in the Russian Navy. Design Project 971 has a double-hull design. The robust body is made of high quality alloy steel with σт = 1 GPa (10,000 kgf / cm²). To simplify the installation of equipment, the boat was designed using zonal blocks, which made it possible to transfer a significant amount of work from the cramped conditions of the sub's compartments directly to the workshop. After completion of the installation, the zonal unit is “rolled” into the hull of the boat and connected to the main cables and pipelines of the ship's systems.http://www.rosprom.gov.ru/news.php?id=3053&fcat=0 A two-stage damping system is used: all mechanisms are placed on damped foundations, in addition, each zone unit is isolated from the body by rubber-cord pneumatic shock absorbers. In addition to reducing the overall noise level of nuclear submarines, such a scheme can reduce the impact of underwater explosions on equipment and crew. The boat has a developed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sevmash
JSC PO Sevmash ( rus, ОАО «ПО „Севмаш“», Севмаш, СМПСМП, "Severodvinsk Machine Building Plant") is a Russian joint-stock company (JSC) under the vertically-integrated United Shipbuilding Corporation. The shipbuilding operations of Sevmash is in the port city of Severodvinsk on the White Sea in the Russian Federation. "Sevmash" is an abbreviation of ''Severnoye Mashinostroitelnoye Predpriyatie'' (Северное Машиностроительное Предприятие), i.e. "Northern Machine-Building Enterprise". Sevmash is the largest shipbuilding enterprise in Russia and today the country's only nuclear submarine producer. In 2009, the company employed 26,951 people and its revenue from military production was $533.02 million. Military production The shipyard's main specialization is manufacturing of ships, submarines and military equipment for the Russian Navy. Sevmash is the only shipyard in Russia producing nuclear submarines. , the le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Highly Enriched Uranium
Enriched uranium is a type of uranium in which the percent composition of uranium-235 (written 235U) has been increased through the process of isotope separation. Naturally occurring uranium is composed of three major isotopes: uranium-238 (238U with 99.2739–99.2752% natural abundance), uranium-235 (235U, 0.7198–0.7202%), and uranium-234 (234U, 0.0050–0.0059%). 235U is the only nuclide existing in nature (in any appreciable amount) that is fissile with thermal neutrons. Enriched uranium is a critical component for both civil nuclear power generation and military nuclear weapons. The International Atomic Energy Agency attempts to monitor and control enriched uranium supplies and processes in its efforts to ensure nuclear power generation safety and curb nuclear weapons proliferation. There are about 2,000 tonnes of highly enriched uranium in the world, produced mostly for nuclear power, nuclear weapons, naval propulsion, and smaller quantities for research reac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Fleet
Severnyy flot , image = Great emblem of the Northern Fleet.svg , image_size = 150px , caption = Northern Fleet's great emblem , start_date = June 1, 1733; Soviet iteration: August 5, 1933 , country = , branch = , type = Fleet , role = Nuclear deterrence;Naval warfare; Amphibious military operations;Combat patrols in the Arctic/Atlantic;Naval presence/diplomacy missions in the Atlantic and elsewhere , size = c. 32 surface warships plus additional support ships/auxiliaries c. 34+ active submarines , command_structure = , garrison = , garrison_label = , nickname = , patron = , motto = , colors = , colors_label ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hero Of Russia
Hero of the Russian Federation (russian: Герой Российской Федерации, Geroy Rossiyskoy Federatsii), also unofficially Hero of Russia (russian: link=no, Герой России, Geroy Rossii), is the highest honorary title of the Russian Federation. The title comes with a Gold Star medal, an insignia of honour that identifies recipients. The title is awarded to persons for "service to the Russian state and nation, usually connected with a heroic feat of valour". The title is bestowed by decree of the president of the Russian Federation. Russian citizenship or being in the service of the Russian state is not obligatory. The title was established in 1992 and, , was awarded more than 970 times, of which more than 440 were posthumously. History The title "Hero of Russia" is a successor to Hero of the Soviet Union (russian: link=no, Герой Советского Союза), which was established by Resolution of the Central Executive Committee of the S ... [...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] |
Ship Naming And Launching
Ceremonial ship launching involves the performance of ceremonies associated with the process of transferring a vessel to the water. It is a nautical tradition in many cultures, dating back thousands of years, to accompany the physical process with ceremonies which have been observed as public celebration and a solemn blessing, usually but not always, in association with the launch itself. Ship launching imposes stresses on the ship not met during normal operation and, in addition to the size and weight of the vessel, represents a considerable engineering challenge as well as a public spectacle. The process also involves many traditions intended to invite good luck, such as christening by breaking a sacrificial bottle of champagne over the bow as the ship is named aloud and launched. Methods There are three principal methods of conveying a new ship from building site to water, only two of which are called "launching". The oldest, most familiar, and most widely used is t ... [...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] |
K-284 Akula
K-284 ''Akula'' was the lead ship of the Soviet Navy's Project 971U "Shchuka-B" (NATO reporting name Akula-class submarine, "Akula") nuclear-powered attack submarines. The ship was Keel laying, laid down on 6 November 1983 and was Ship commisisoning, commissioned in the Pacific Fleet (Russia), Pacific Fleet on 30 December 1984. The submarine was 12-15 dB quieter than the previous generation of Soviet submarines. K-284 served in the Soviet fleet until the collapse of the Soviet Union in 1991 and then continued to serve in the Russian Navy. The submarine was decommissioned in 2001. References {{DEFAULTSORT:Akula (K-284), Russian Submarine Akula-class submarines Ships built in the Soviet Union 1984 ships ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Very Low Frequency
Very low frequency or VLF is the ITU designation for radio frequencies (RF) in the range of 3–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively. The band is also known as the myriameter band or myriameter wave as the wavelengths range from one to ten myriameters (an obsolete metric unit equal to 10 kilometers). Due to its limited bandwidth, audio (voice) transmission is highly impractical in this band, and therefore only low data rate coded signals are used. The VLF band is used for a few radio navigation services, government time radio stations (broadcasting time signals to set radio clocks) and for secure military communication. Since VLF waves can penetrate at least 40 meters (131 ft) into saltwater, they are used for military communication with submarines. Propagation characteristics Because of their long wavelengths, VLF radio waves can diffract around large obstacles and so are not blocked by mountain ranges, and can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radar
Radar is a detection system that uses radio waves to determine the distance ('' ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwaves domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the objects. Radio waves (pulsed or continuous) from the transmitter reflect off the objects and return to the receiver, giving information about the objects' locations and speeds. Radar was developed secretly for military use by several countries in the period before and during World War II. A key development was the cavity magnetron in the United Kingdom, which allowed the creation of relatively small systems with sub-meter resolution ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propulsor
{{short description, Mechanical device to propel a vessel A propulsor is a mechanical device that gives propulsion. The word is commonly used in the marine vernacular, and implies a mechanical assembly that is more complicated than a propeller. The Kort nozzle, pump-jet and rim-driven thruster are examples. An example propulsor is shown in the accompanying picture. It has a shroud which cuts down on blade-tip cavitation and radiated noise. It also has a rotor element and a stator. The stator concentrates the thrust in axial direction and reduces energy wasted in the tangential flow (therefore eliminating torque on the hull). The number of blades in the rotor and stator will typically be two different prime numbers to avoid standing waves. The blades in the rotor or the stator may be angled to further reduce noise. The physical design and layout is very much similar to a single stage axial-flow compressor. Other propulsors Voith Schneider The Voith Schneider Propeller, also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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