|
JS Nichinan
JS ''Nichinan'' (AGS-5105) is the only ship of her type of oceanographic research ship for the Japan Maritime Self-Defense Force. Development With the shift to passive anti-submarine warfare, the collection of marine environmental data is required for efficient execution of maritime operations, and seafloor topography / sediment, tidal currents / geomagnetism, and water temperature / salt content, etc. Marine weather was interrelated and needed to be measured precisely. For this reason, the Maritime Self-Defense Force built the JDS Akashi in the plan of 1967, and in 1969, it newly formed the Marine Operations Corps as its operation unit and started marine environment information activities. After that, in the 1950s, Futami-class and JS Suma were installed, and ocean observations were carried out with a system of four vessels. Of these, this ship was planned as a substitute for the 42AGS, which was scheduled to be removed in the latter half of the 1990s, and was app ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nichinan, Miyazaki
is a city in Miyazaki Prefecture, Japan. The city was founded on January 1, 1950. As of June 1, 2019, the city has an estimated population of 51,241 and a population density of 95.6 persons per km2. The total area is 536.11 km2. History Nichinan began as part of the Fujiwara Shōen in the Heian period. The city's history and development were heavily influenced by the history of Obi town, a district of Nichinan which still exists today. Obi was one of the eight districts of Hyūga, an old province in eastern Japan, which was ruled by the Itō clan based at Obi Castle. Throughout the Sengoku period, the Itō clan's most serious rival was the neighbouring Shimazu clan. The Shimazu clan had unified Satsuma Province and Ōsumi Province under its control, and began to clash with the Itō clan in 1570. The Itō clan was finally defeated by the Shimazu clan in 1578. After seeking help from then Shōgun Toyotomi Hideyoshi, the family's lands were restored in 1587 after his in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Topography
Topography is the study of the forms and features of land surfaces. The topography of an area may refer to the land forms and features themselves, or a description or depiction in maps. Topography is a field of geoscience and planetary science and is concerned with local detail in general, including not only relief, but also natural, artificial, and cultural features such as roads, land boundaries, and buildings. In the United States, topography often means specifically ''relief'', even though the USGS topographic maps record not just elevation contours, but also roads, populated places, structures, land boundaries, and so on. Topography in a narrow sense involves the recording of relief or terrain, the three-dimensional quality of the surface, and the identification of specific landforms; this is also known as geomorphometry. In modern usage, this involves generation of elevation data in digital form ( DEM). It is often considered to include the graphic representat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceremonial Ship 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 (ship), 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 widel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laid Down
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] |
Unmanned Underwater Vehicle
Unmanned underwater vehicles (UUV), sometimes known as underwater drones, are submersible vehicles that can operate underwater without a human occupant. These vehicles may be divided into two categories: remotely operated underwater vehicles (ROUVs) and autonomous underwater vehicles (AUVs). ROUVs are remotely controlled by a human operator. AUVs are automated and operate independently of direct human input. Classifications Remotely operated underwater vehicle Remotely Operated Underwater Vehicles (ROUVs) is a subclass of UUVs with the primary purpose of replacing humans for underwater tasks due to the difficult underwater conditions. ROUVs are designed to perform educational or industrial missions. They are manually controlled by an operator to perform tasks that include surveillance and patrolling. The structure of ROUVs disqualify it from being able to operate autonomously. In addition to a camera, actuators, and sensors, ROUVs often include a “gripper” or somethin ... [...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 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) to ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JS Wakasa
JS ''Wakasa'' (AGS-5104) was a ''Futami''-class oceanographic research ship for the Japan Maritime Self-Defense Force. Construction and career ''Wakasa'' was laid down on 21 August 1984 and launched on 21 May 1985 by Hitachi Zosen Corporation Maizuru Shipyard. She was commissioned on 25 February 1986 and was incorporated into the Marine Service Corps and deployed in Yokosuka. The fishing boat Kiyotoku Maru (7.3t), whose hull was cut off after colliding with JS Atago JS ''Atago'' (DDG-177), , is the lead ship of her class of guided missile destroyer in the Japan Maritime Self-Defense Force (JMSDF). She was named after Mount Atago ''Mount Atago is a very common name for peaks all over Japan.'' is a 924m ... on February 18, 2008, was towed together with JS Muroto. On September 18, 2009, Naoko Matsuo, 3rd class Kaisa (at that time), was appointed as the first female captain of the Maritime Self-Defense Force, and became a hot topic. In response to the Great ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JS Suma
JS or js may refer to: Computing * JavaScript, a high-level, just-in-time compiled, object-oriented programming language * JScript, Microsoft's dialect of the ECMAScript standard used in Internet Explorer Businesses and organizations * Jonge Socialisten, a Dutch political group * Air Koryo, North Korea's state-run airline, IATA code JS * Jahangir Siddiqui & Co., a Pakistani financial services company * JS Model, Chinese manufacturer of UAVs * Jaffna Stallions, a team participating in Lanka Premier League * United Serbia (''Jedinstvena Srbija''), a political party in Serbia * JS Global, a Chinese manufacturer of home appliances Other uses * JS (band), an American female R&B duo * "JS" (song), by Mamoru Miyano, 2009 * Japanese Ship, a ship prefix used by the Japanese military * Jiangsu, a province of China * Joule-second (J s, or J∙s), describing the amount of action, or the unit measure of angular momentum * Joule/second The watt (symbol: W) is the unit of pow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JDS Akashi
JDS ''Akashi'' (AGS-5101) was an oceanographic research ship of Japan Maritime Self-Defense Force (JMSDF) in the late 1960s. History In Japan before World War II, the Imperial Japanese Navy Hydrographic Department was engaged in marine surveying and observation missions, but after the war, after the Ministry of Transport, it became a subordinate with the establishment of the Japan Coast Guard. Due to the transition (currently the Marine Information Department), the Maritime Self-Defense Force, which was established after that, did not have a ship specializing in marine surveying and observation missions. However, with the passive warfare of anti-submarine warfare, the collection of marine environmental data is required for efficient execution of maritime operations, and seafloor topography / sediment, tidal currents / geomagnetism, and water temperature / salt content and marine weather, etc. were interrelated and needed to be measured precisely. As for the ocean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Weather Forecasting
Marine weather forecasting is the process by which mariners and meteorological organizations attempt to forecast future weather conditions over the Earth's oceans. Mariners have had rules of thumb regarding the navigation around tropical cyclones for many years, dividing a storm into halves and sailing through the normally weaker and more navigable half of their circulation. Marine weather forecasts by various weather organizations can be traced back to the sinking of the Royal Charter in 1859 and the RMS Titanic in 1912. The wind is the driving force of weather at sea, as wind generates local wind waves, long ocean swells, and its flow around the subtropical ridge helps maintain warm water currents such as the Gulf Stream. The importance of weather over the ocean during World War II led to delayed or secret weather reports, in order to maintain a competitive advantage. Weather ships were established by various nations during World War II for forecasting purposes, and were m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salt Concentration
Salinity () is the saltiness or amount of salt dissolved in a body of water, called saline water (see also soil salinity). It is usually measured in g/L or g/kg (grams of salt per liter/kilogram of water; the latter is dimensionless and equal to ‰). Salinity is an important factor in determining many aspects of the chemistry of natural waters and of biological processes within it, and is a thermodynamic state variable that, along with temperature and pressure, governs physical characteristics like the density and heat capacity of the water. A contour line of constant salinity is called an ''isohaline'', or sometimes ''isohale''. Definitions Salinity in rivers, lakes, and the ocean is conceptually simple, but technically challenging to define and measure precisely. Conceptually the salinity is the quantity of dissolved salt content of the water. Salts are compounds like sodium chloride, magnesium sulfate, potassium nitrate, and sodium bicarbonate which dissolve into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temperature
Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness. Temperature is measured with a thermometer. Thermometers are calibrated in various temperature scales that historically have relied on various reference points and thermometric substances for definition. The most common scales are the Celsius scale with the unit symbol °C (formerly called ''centigrade''), the Fahrenheit scale (°F), and the Kelvin scale (K), the latter being used predominantly for scientific purposes. The kelvin is one of the seven base units in the International System of Units (SI). Absolute zero, i.e., zero kelvin or −273.15 °C, is the lowest point in the thermodynamic temperature scale. Experimentally, it can be approached very closely but not actually reached, as recognized in the third law of thermodynamics. It would be impossible to extract energy as heat from a body at that temperature. Temperature is important in all fields of na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Marine Weather Forecasting")
