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DSV-4 Sea Cliff
DSV-4 (formerly known as ''Sea Cliff'') is a 25-ton, crewed deep-ocean research submersible owned by the United States Navy, now known only by its hull number, not by its former name. DSV-4 is an ''Alvin''-class deep submergence vehicle (DSV), a sister ship to ''Turtle'' (DSV-3), ''Alvin'' (DSV-2). The ''Alvin''-class DSVs were designed to replace older DSVs, such as the less-maneuverable ''Trieste''-class bathyscaphes. ''Sea Cliff'' was built by Electric Boat in Groton, Connecticut for the U.S. Navy and was completed in December 1968. It spent much of its service life on loan to the Woods Hole Oceanographic Institution. DSV-4 originally had a maximum dive depth of , as all ''Alvin''-class DSVs did at first. It was redesigned to dive to and refitted in 1984. With the refit of DSV-4, the bathyscaphe DSV-1 (formerly known as ''Trieste II'') was retired from service. In 1985 the Sea Cliff made a record dive for this vessel type by diving 20,000 feet off Guatemala's Pacific Coas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy
The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage of its active battle fleet alone exceeding the next 13 navies combined, including 11 allies or partner nations of the United States as of 2015. It has the highest combined battle fleet tonnage (4,635,628 tonnes as of 2019) and the world's largest aircraft carrier fleet, with eleven in service, two new carriers under construction, and five other carriers planned. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the United States Navy is the third largest of the United States military service branches in terms of personnel. It has 290 deployable combat vessels and more than 2,623 operational aircraft . The United States Navy traces its origins to the Continental Navy, which was established during the American Revo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continents of Asia and Oceania in the west and the Americas in the east. At in area (as defined with a southern Antarctic border), this largest division of the World Ocean—and, in turn, the hydrosphere—covers about 46% of Earth's water surface and about 32% of its total surface area, larger than Earth's entire land area combined .Pacific Ocean . '' Britannica Concise.'' 2008: Encyclopædia Britannica, Inc. The centers of both the |
Alvin-class Deep-submergence Vehicles
A deep-submergence vehicle (DSV) is a deep-diving crewed submersible that is self-propelled. Several navies operate vehicles that can be accurately described as DSVs. DSVs are commonly divided into two types: research DSVs, which are used for exploration and surveying, and DSRVs (Deep Submergence Rescue Vehicle), which can be used for rescuing the crew of a sunken navy submarine, clandestine (espionage) missions (primarily installing wiretaps on undersea communications cables), or both. DSRVs are equipped with docking chambers to allow personnel ingress and egress via a manhole. The real-life feasibility of any DSRV-based rescue attempt is hotly debated, because the few available docking chambers of a stricken submarine may be flooded, trapping the sailors still alive in other dry compartments. The only attempt to rescue a stricken submarine with these so far (the Russian submarine ''Kursk'') ended in failure as the entire crew who survived the explosion had either suffocated or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federation Of American Scientists
The Federation of American Scientists (FAS) is an American nonprofit global policy think tank with the stated intent of using science and scientific analysis to attempt to make the world more secure. FAS was founded in 1946 by scientists who worked on the Manhattan Project to develop the first atomic bombs. The Federation of American Scientists aims to reduce the amount of nuclear weapons that are in use, and prevent nuclear and radiological terrorism. They hope to present high standards for nuclear energy's safety and security, illuminate government secrecy practices, as well as track and eliminate the global illicit trade of conventional, nuclear, biological and chemical weapons. With 100 sponsors, the Federation of American Scientists says that it promotes a safer and more secure world by developing and advancing solutions to important science and technology security policy problems by educating the public and policy makers, and promoting transparency through research and ana ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Global War On Terrorism Service Medal
The Global War on Terrorism Service Medal (GWOT-SM) is a military award of the United States Armed Forces which was created through Executive Order 13289 on 12 March 2003, by President George W. Bush. The medal recognizes those military service members who have supported operations to counter terrorism in the War on Terror from 11 September 2001, to a date yet to be determined. Previously awarded for the broadly defined awarding criterion of "support duty", the GWOT-SM is no longer a quasi-automatically awarded medal similar to the National Defense Service Medal (NDSM), whereas the GWOT-SM is awarded after thirty days of post-training active service. Effective September 11, 2022, it is now awarded to servicemembers only serving in the area of effect for approved campaigns related to the Global War on Terrorism. Background In September 2002, the U.S. Department of Defense sent a request to the U.S. Army Institute of Heraldry to provide a design for a Global War on Terrorism Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Defense Service Medal
The National Defense Service Medal (NDSM) is a service award of the United States Armed Forces established by President Dwight D. Eisenhower in 1953. It is awarded to every member of the US Armed Forces who has served during any one of four specified periods of armed conflict or national emergency from June 27, 1950 through the present. Combat or "in theater" service is not a requirement for the award. History The National Defense Service Medal (NDSM) was first intended to be a "blanket campaign medal" awarded to service members who served honorably during a designated time period of when a "national emergency" had been declared during a time of war or conflict. It may also be issued to active military members for any other period that the Secretary of Defense designates. To date, the NDSM has been awarded for four specific time periods, which roughly correspond to the Korean (1950-1954), Vietnam (1961-1974), Gulf (1990-1995), and the Global War on Terrorism (2001 to 2022). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Navy E Ribbon
The Navy "E" Ribbon or Battle Efficiency Ribbon (informally the Battle "E" ribbon) was authorized on March 31, 1976, by Secretary of the Navy J. William Middendorf as a unit award for battle efficiency competition. The service ribbon replaced the "E" patch previously sewn on the right sleeve of the enlisted naval uniform for rates/pay grades E-1 through E-6. History The Navy "E" Ribbon was designed by AZ3 Cynthia L. Crider in 1973. Her design and recommendation were approved by the Secretary of the Navy after 3 years, and the ribbon was subsequently created by the Department of the Army, which has the final approval for the design and colors of all ribbons and medals in the U.S. military. Serving with Carrier Airborne Early Warning Squadron 88 (VAW-88), a Naval Air Reserve E-2 Hawkeye squadron at NAS North Island, CA, Petty Officer Crider designed the ribbon after her squadron won the “E” award for the second time in a row, but with the new uniform change could not wear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meritorious Unit Citation
The Meritorious Unit Citation is a collective group decoration awarded to members of Australian military units. It recognises sustained outstanding service in warlike operations. The Meritorious Unit Citation was created in 1991, along with the Unit Citation for Gallantry. Description The insignia of a Meritorious Unit Citation is a rhodium plated sterling silver frame measuring , with a design of flames emanating from the edge to the centre. The frame surrounds a ribbon bar of old gold, which may display a rhodium plated, diameter, sterling silver Federation Star on its centre. Members attached to the unit when the citation is awarded wear it with the Federation Star, and continue to wear this after leaving the unit. Members who subsequently join the unit wear the citation without the Federation Star, and discontinue wearing it after leaving the unit. Recipients * – 4 November 1991 ** '' For meritorious operational service in the Persian Gulf during enforcement of sanction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New York Times
''The New York Times'' (''the Times'', ''NYT'', or the Gray Lady) is a daily newspaper based in New York City with a worldwide readership reported in 2020 to comprise a declining 840,000 paid print subscribers, and a growing 6 million paid digital subscribers. It also is a producer of popular podcasts such as '' The Daily''. Founded in 1851 by Henry Jarvis Raymond and George Jones, it was initially published by Raymond, Jones & Company. The ''Times'' has won 132 Pulitzer Prizes, the most of any newspaper, and has long been regarded as a national " newspaper of record". For print it is ranked 18th in the world by circulation and 3rd in the U.S. The paper is owned by the New York Times Company, which is publicly traded. It has been governed by the Sulzberger family since 1896, through a dual-class share structure after its shares became publicly traded. A. G. Sulzberger, the paper's publisher and the company's chairman, is the fifth generation of the family to head the pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Vessel Register
The ''Naval Vessel Register'' (NVR) is the official inventory of ships and service craft in custody of or titled by the United States Navy. It contains information on ships and service craft that make up the official inventory of the Navy from the time a vessel is authorized through its life cycle and disposal. It also includes ships that have been removed from the register (often termed '' stricken'' or ''struck''), but not disposed of by sale, transfer to another government, or other means. Ships and service craft disposed of prior to 1987 are currently not included, but are gradually being added along with other updates. History The NVR traces its origin back to the 1880s, having evolved from several previous publications. In 1911, the Bureau of Construction and Repair published ''Ships Data US Naval Vessels'', which subsequently became the ''Ships Data Book'' in 1952 under the Bureau of Ships. The Bureau of Ordnance's ''Vessel Register'', first published in 1942 and retitl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plug Door
A plug door is a door designed to seal itself by taking advantage of pressure difference on its two sides and is typically used on aircraft with cabin pressurization. The higher pressure on one side forces the usually wedge-shaped door into its socket, making a good seal and preventing it from being opened until the pressure is released. Conversely, a non-plug door relies on the strength of the locking mechanism to keep the door shut. Aircraft The plug door is often seen on aircraft with pressurized cabins. Due to the air pressure within the aircraft cabin being higher than that of the surrounding atmosphere, the door seals itself closed as the aircraft climbs and the pressure differential increases. This prevents accidental opening of the door. In the event of a decompression, with there no longer being a pressure differential, the doors may be opened, and as such most airlines' operating procedures require cabin crew to keep passengers away from the doors until the aircraft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Airlines Flight 811
United Airlines Flight 811 was a regularly scheduled airline flight from Los Angeles to Sydney, with intermediate stops at Honolulu and Auckland. On February 24, 1989, the Boeing 747-122 serving the flight experienced a cargo-door failure in flight shortly after leaving Honolulu. The resulting explosive decompression blew out several rows of seats, killing nine passengers. The aircraft returned to Honolulu and landed with no further incident. Aircraft The aircraft involved was a Boeing 747-122 ( registration number ''N4713U''). It was delivered to United Airlines on November 3, 1970. At the time of the accident, the Boeing had accumulated 58,814 total flight hours, 15,028 flight 'pressurization' cycles, and had not been involved in any previous accidents. On February 24, 1989, the aircraft was scheduled by United Airlines to operate as Flight 811 from Los Angeles International Airport in Los Angeles, California, to Sydney Airport in Mascot, New South Wales, Australia, with int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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