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Leeuwin Class Survey Vessel
The ''Leeuwin'' class is a two-ship class of hydrographic survey vessels operated by the Royal Australian Navy (RAN). and were ordered from NQEA in 1996, and were commissioned in 2000. The ships are capable of charting waters up to deep, carry three survey boats, and could operate an AS 350B Squirrel helicopter. In addition to surveying duties, since 2001 both vessels have been used to supplement the RAN patrol force. ''Leeuwin'' is based at , while ''Melville'' was decommissioned in August 2024. Design and construction The ships have a displacement of 2,170 tons at full load.Saunders (ed.), ''Jane's Fighting Ships 2008–2009'', p. 33 They are long, with a beam of , and a draught of . Main propulsion machinery consists of four GEC Alsthom 6RK 215 diesel generators, which supply two Alsthom electric motors, each driving a propeller shaft. A Schottel bow thruster is fitted for additional manoeuvrability. Maximum speed is , with a range of at . Each ship was originally fitt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Davit
Boat suspended from Welin Quadrant davits; the boat is mechanically 'swung out' Gravity multi-pivot on Scandinavia'' file:Bossoir a gravité.jpg, Gravity Roller Davit file:Davits-starbrd.png, Gravity multi-pivot davit holding rescue vessel on a North Sea ferry file:Freefall lifeboat.JPG, Freefall lifeboat on the ''Spring Aeolian'' file:Frapping line.jpg, Frapping line Labeled Tricing Gripe Steps to launch davit Roller Gravity Davit A davit () is any of various crane-like devices used on a ship for supporting, raising, and lowering equipment such as boats and anchors. Davit systems are most often used to lower an emergency lifeboat to the embarkation level to be boarded. The lifeboat davit has falls (now made of wire, historically of manila rope) that are used to lower the lifeboat into the water. Davits can also be used as man-overboard safety devices to retrieve personnel from the water. The maintaining and operation of davits is all under jurisdiction of the Intern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Institute Press
The United States Naval Institute (USNI) is a private non-profit military association that offers independent, nonpartisan forums for debate of national security issues. In addition to publishing magazines and books, the Naval Institute holds several annual conferences. The Naval Institute is based in Annapolis, Maryland. Established in 1873, the Naval Institute claimed "almost 50,000 members" in 2020, mostly active and retired personnel of the United States Navy, Marine Corps and Coast Guard. The organization also has members in over 90 countries. The organization has no official or funding ties to the United States Naval Academy or the United States Navy, though it is based on the grounds of the Naval Academy through permission granted by a 1936 Act of Congress. History The United States Naval Institute was formed on October 9, 1873, by 15 naval officers gathered at the Naval Academy's Department of Physics and Chemistry building in Annapolis to discuss, among other topics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Janes Information Services
Janes is a global open-source intelligence company specialising in military, national security, aerospace and transport topics, whose name derives from British author Fred T. Jane. History Jane's Information Group was founded in 1898 by Fred T. Jane, who had begun sketching ships as an enthusiast naval artist while living in Portsmouth. This gradually developed into an encyclopedic knowledge, culminating in the publishing of ''All the World's Fighting Ships'' (1898). The company then gradually branched out into other areas of military expertise. The books and trade magazines published by the company are often considered the ''de facto'' public source of information on warfare and transportation systems. Based in Greater London for most of its existence, the group was owned by the Thomson Corporation, the Woodbridge Company, then IHS Markit, before being acquired by Montagu Private Equity in 2019. In March 2022, Janes acquired Washington, D.C.-based RWR Advisory Group. Descr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Routledge
Routledge ( ) is a British multinational corporation, multinational publisher. It was founded in 1836 by George Routledge, and specialises in providing academic books, academic journals, journals and online resources in the fields of the humanities, behavioral science, behavioural science, education, law, and social science. The company publishes approximately 1,800 journals and 5,000 new books each year and their backlist encompasses over 140,000 titles. Routledge is claimed to be the largest global academic publisher within humanities and social sciences. In 1998, Routledge became a subdivision and Imprint (trade name), imprint of its former rival, Taylor & Francis, Taylor & Francis Group (T&F), as a result of a £90-million acquisition deal from Cinven, a venture capital group which had purchased it two years previously for £25 million. Following the merger of Informa and T&F in 2004, Routledge became a publishing unit and major imprint within the Informa "academic publishing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation Relex
Operation Relex is the name given to the Australian Defence Force (ADF) border protection operation in the country's northern approaches conducted between 2001 and 2006. The operation was instigated following the Tampa affair in September 2001 and the Australian government's resultant Pacific Solution. The focus of Operation Relex was illegal immigration, with assets from all three services of the ADF deployed to prevent the arrival of Suspected Illegal Entry Vessels (SIEVs) in the Australian migration zone. The primary period of activity of Operation Relex was between October and December 2001 when ten SIEVs were intercepted by HMA Ships , , and , assisted by several Fremantle-class patrol boats. Operation Relex was folded into the broader border protection activity named Operation Resolute which commenced in July 2006. In 2013, the Abbott government The Abbott government was the federal executive government of Australia led by the 28th Prime Minister Tony Abbott. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Hydrographic Office
The Australian Hydrographic Service (formerly known as the Royal Australian Navy Hydrographic Service) is the Australian Commonwealth Government agency responsible for providing hydrographic services that meet Australia's obligations under the SOLAS convention and the national interest; enabling safe navigation, maritime trade and supporting protection of the marine environment. The agency, headquartered at the Australian Hydrographic Office in Wollongong, New South Wales, is an element of the Royal Australian Navy (RAN), and serves both military and civilian functions. The names Australian Hydrographic Service and the Australian Hydrographic Office are commonly abbreviated as AHS or AHO respectively. Role The Australian Hydrographic Service is an element of the RAN, and serves both military and civilian functions. The headquarters of the agency is at the Australian Hydrographic Office in Wollongong, New South Wales.Slade, in Oldham, ''100 Years of the Royal Australian Navy'', p. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennant Number
In the Royal Navy and other navies of Europe and the Commonwealth of Nations, ships are identified by pennant number (an internationalisation of ''pendant number'', which it was called before 1948). Historically, naval ships flew a flag that identified a flotilla or type of vessel. For example, the Royal Navy used a red burgee for torpedo boats and a pennant with an H for torpedo boat destroyers. Adding a number to the type-identifying flag uniquely identified each ship. In the current system, a letter prefix, called a ''flag superior'', identifies the type of ship, and numerical suffix, called a flag inferior, uniquely identifies an individual ship. Not all pennant numbers have a flag superior. Royal Navy systems The Royal Navy first used pennants to distinguish its ships in 1661 with a proclamation that all of his majesty's ships must fly a union pennant. This distinction was further strengthened by a proclamation in 1674 which forbade merchant vessels from flying any ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queensland
Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Australia and New South Wales to the west, south-west and south, respectively. To the east, Queensland is bordered by the Coral Sea and the Pacific Ocean; to the state's north is the Torres Strait, separating the Australian mainland from Papua New Guinea, and the Gulf of Carpentaria to the north-west. With an area of , Queensland is the world's List of country subdivisions by area, sixth-largest subnational entity; it List of countries and dependencies by area, is larger than all but 16 countries. Due to its size, Queensland's geographical features and climates are diverse, and include tropical rainforests, rivers, coral reefs, mountain ranges and white sandy beaches in its Tropical climate, tropical and Humid subtropical climate, sub-tropical c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RHIB
A rigid inflatable boat (RIB), also rigid-hull inflatable boat or rigid-hulled inflatable boat (RHIB), is a lightweight but high-performance and high-capacity boat constructed with a rigid hull bottom joined to side-forming air tubes that are inflated with air to high pressure to give the sides resilient rigidity along the boat's topsides. The design is stable, light, fast and seaworthy. The inflated collar acts as a life jacket, ensuring that the vessel retains its buoyancy, even if the boat is taking on water. The RIB is an evolutionary development of the inflatable boat with a rubberized fabric bottom that is stiffened with flat boards within the collar to form the deck or floor of the boat. History Origins in Wales The concept of configuring a rigid hull surrounded by an inflated, compartmentalized buoyancy tube from prow to transom originated and evolved from the problems that plagued existing rubberized fabric bottom inflated motorboats: fabric wear-through and poor sea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echo Sounder
Echo sounding or depth sounding is the use of sonar for ranging, normally to determine the depth of water (bathymetry). It involves transmitting acoustic waves into water and recording the time interval between emission and return of a pulse; the resulting time of flight, along with knowledge of the speed of sound in water, allows determining the distance between sonar and target. This information is then typically used for navigation purposes or in order to obtain depths for charting purposes. Echo sounding can also be used for ranging to other targets, such as fish schools. Hydroacoustic assessments have traditionally employed mobile surveys from boats to evaluate fish biomass and spatial distributions. Conversely, fixed-location techniques use stationary transducers to monitor passing fish. The word '' sounding'' is used for all types of depth measurements, including those that don't use sound, and is unrelated in origin to the word ''sound'' in the sense of noise or tone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NQEA
NQEA Pty Ltd is an engineering and shipbuilding company based in Cairns, Australia. The company was founded in 1948 as an engineering supply company named North Queensland Engineers & Agents, then expanded in 1966 into shipbuilding and was renamed. NQEA has built several ships for the Royal Australian Navy (including the Fremantle-class patrol boat, ''Fremantle''-class patrol boats and Leeuwin-class survey vessel, ''Leeuwin''-class survey ships). The company was contracted to build modules to form the hulls of the Hobart-class destroyer, ''Hobart''-class air warfare destroyer project in May 2009, but lost the contract a month later to BAE Systems Australia after admissions that an internal restructuring may lead to difficulties meeting the contracted obligations. The company has also built catamaran ferries for the State Transit Authority (now operated by Sydney Ferries), London based Thames Clippers, and operators in French Polynesia and the Netherlands. Ships built Referen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
