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CL-154-class Cruiser
The CL-154 class of gun light cruisers was a United States Navy project from the last two years of World War II, with antecedents reaching back to 1938 and earlier. The CL-154 class was contemporary to the gun light cruisers and the gun heavy cruisers: like them the CL-154 design incorporated the lessons learned of World War II combat. The Navy allocated six hull numbers (CL-154 through CL-159) to the CL-154 class for the planned construction, but unlike the ''Worcester'' and ''Des Moines'' classes the CL-154 class would be cancelled with no units named or constructed. Had these ships been built, they would have been given the hull classification ''CLAA'' (anti-aircraft light cruiser) on 18 March 1949. Overview The CL-154 class was the final attempt to build a "super-" by replacing the ''Atlanta''s 5-inch/38-caliber gun with the new 5-inch/54-caliber Mark 16 gun. The new gun had a higher rate of fire and a longer range than the 38-caliber gun, and fired a heavier and mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Cruiser
A light cruiser is a type of small or medium-sized warship. The term is a shortening of the phrase "light armored cruiser", describing a small ship that carried armor in the same way as an armored cruiser: a protective belt and deck. Prior to this smaller cruisers had been of the protected cruiser model, possessing armored decks only. While lighter and smaller than other contemporary ships they were still true cruisers, retaining the extended radius of action and self-sufficiency to act independently around the world. Cruisers mounting larger guns and heavier armor relative to most light cruisers would come to be known as heavy cruisers, though the designation of 'light' versus 'heavy' cruisers would vary somewhat between navies. Through their history light cruisers served in a variety of roles, primarily on long-range detached patrol work, covering other military operations or global shipping lanes, as scouts and fleet support vessels for battle fleets, as destroyer command ship ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperial Japanese Navy
The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, Potsdam Declaration, when it was dissolved following surrender of Japan, Japan's surrender in World War II. The Japan Maritime Self-Defense Force (JMSDF) was formed between 1952 and 1954 after the dissolution of the IJN. The IJN was the third largest navy in the world by 1920, behind the Royal Navy and the United States Navy (USN). It was supported by the Imperial Japanese Navy Air Service for reconnaissance and airstrike operations from the fleet. It was the primary opponent of the Allies of World War II, Western Allies in the Pacific War. The IJN additionally fielded Imperial Japanese Navy land forces, limited land-based forces, including Special Naval Landing Forces, professional marines, Japanese marine paratroopers of World War II, marine paratrooper units, anti-aircraft defense units ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cost-effectiveness Analysis
Cost-effectiveness analysis (CEA) is a form of economic analysis that compares the relative costs and outcomes (effects) of different courses of action. Cost-effectiveness analysis is distinct from cost–benefit analysis, which assigns a monetary value to the measure of effect. Cost-effectiveness analysis is often used in the field of health services, where it may be inappropriate to monetize health effect. Typically the CEA is expressed in terms of a ratio where the denominator is a gain in health from a measure (years of life, premature births averted, sight-years gained) and the numerator is the cost associated with the health gain. The most commonly used outcome measure is quality-adjusted life years (QALY). Cost–utility analysis is similar to cost-effectiveness analysis. Cost-effectiveness analyses are often visualized on a plane consisting of quadrant (plane geometry), four quadrants, the cost represented on one axis and the effectiveness on the other axis. Cost-effective ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bofors 40 Mm Automatic Gun L/60
The Bofors 40 mm Automatic Gun L/60 (often referred to simply as the "Bofors 40 mm gun", the "Bofors gun" and the like, see #Name, name) is an Anti-aircraft warfare, anti-aircraft autocannon, designed in the 1930s by the Swedish arms manufacturer AB Bofors. The gun was designed as an intermediate anti-aircraft gun, filling the gap between fast firing close-range small calibre anti-aircraft guns and slower firing long-range high calibre anti-aircraft guns. For its time, the Bofors 40 mm L/60 was perfectly suited for this role and outperformed competing designs in the years leading up to World War II in both effectiveness and reliability. It entered the export market around 1932 and was in service with 18 countries by 1939. Throughout World War II it became one of the most popular and widespread medium-weight anti-aircraft guns. It was used by the majority of the western Allies of World War II, Allies and some Axis powers such as Nazi Germany and Hungary. In the po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oerlikon 20 Mm Cannon
The Oerlikon 20 mm cannon is a series of autocannons based on an original German Becker Type M2 20 mm cannon design that appeared very early in World War I. It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II. Many versions of the cannon are still used. Blowback-operated models History Origins During World War I, the German industrialist Reinhold Becker developed a 20 mm caliber cannon, known now as the 20 mm Becker using the advanced primer ignition blowback (API blowback) method of operation. This used a 20×70mmRB cartridge and had a cyclic rate of fire of 300 rpm. It was used on a limited scale as an aircraft gun on ''Luftstreitkräfte'' warplanes, and an anti-aircraft gun towards the end of that war. Because the Treaty of Versailles banned further production of such weapons in Germany, the patents and design works were transferred in 1919 to the Swiss firm SEMAG (''Seebach M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ship Characteristics Board
The Ship Characteristics Board was a unit of the United States Navy. The purpose of the Ship Characteristics Board was to coordinate the creation of 'ship characteristics' that are essential to the design of naval combatants and auxiliaries. Coordination was required because the operators and the designers of ships had different interests, perceptions, concepts, and constraints: as summarized by the naval historian Norman Friedman, "How to achieve the best possible compromise among competing bureaus has been one of the great dilemmas of 20th-century U.S. naval administration." This list of SCB projects is a useful exposition of the U.S. Navy's shipbuilding priorities in the first half of the Cold War. History The Ship Characteristics Board was founded in 1945 under the Office of the Chief of Naval Operations / OpNav. It was created after the body previously responsible for coordinating ships characteristics, the General Board, had been seen as ineffective in a series of ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Forrestal
James Vincent Forrestal (February 15, 1892 – May 22, 1949) was the last Cabinet (government), cabinet-level United States Secretary of the Navy and the first United States Secretary of Defense. Forrestal came from a very strict middle-class Irish Catholic family. He was a successful financier on Wall Street before becoming Undersecretary of the Navy in 1940, shortly before the United States entered the Second World War. He became Secretary of the Navy in May 1944 upon the death of his superior, Colonel (United States), Col. Frank Knox. President Franklin D. Roosevelt requested that Forrestal take the lead in building up the Navy. In 1947, after the end of the war, President Harry S. Truman appointed him the first secretary of the newly created Department of Defense. Forrestal was intensely hostile to the Soviet Union, fearing Communist expansion in Europe and the Middle East. Along with Secretary of State George C. Marshall, he strongly opposed the United States' support fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secretary Of The Navy
The Secretary of the Navy (SECNAV) is a statutory officer () and the head (chief executive officer) of the Department of the Navy, a military department within the United States Department of Defense. On March 25, 2025, John Phelan was confirmed as Secretary of the Navy. By law, the Secretary of the Navy must be a civilian at least five years removed from active military service. The secretary is appointed by the president and requires confirmation by the Senate. History The position of Secretary of the Navy was created in 1798. It was a member of the president's Cabinet until 1949, when the Secretary of the Navy (and the secretaries of the Army and Air Force) were by amendments to the National Security Act of 1947 made subordinate to the secretary of defense. From 2001 to 2019, proposals to rename the Department of the Navy to the Department of the Navy and Marine Corps, which would have also renamed the Secretary of the Navy to the Secretary of the Navy and Marine Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Franklin D
Franklin may refer to: People and characters * Franklin (given name), including list of people and characters with the name * Franklin (surname), including list of people and characters with the name * Franklin (class), a member of a historical English social class Places * Franklin (crater), a lunar impact crater * Franklin County (other), in a number of countries * Mount Franklin (other), including Franklin Mountain Australia * Franklin, Tasmania, a township * Division of Franklin, federal electoral division in Tasmania * Division of Franklin (state), state electoral division in Tasmania * Franklin, Australian Capital Territory, a suburb in the Canberra district of Gungahlin * Franklin River, river of Tasmania * Franklin Sound, waterway of Tasmania Canada * District of Franklin, a former district of the Northwest Territories * Franklin, Quebec, a municipality in the Montérégie region * Rural Municipality of Franklin, Manitoba * Franklin, Manitoba, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
President Of The United States
The president of the United States (POTUS) is the head of state and head of government of the United States. The president directs the Federal government of the United States#Executive branch, executive branch of the Federal government of the United States, federal government and is the Powers of the president of the United States#Commander-in-chief, commander-in-chief of the United States Armed Forces. The power of the presidency has grown since the first president, George Washington, took office in 1789. While presidential power has ebbed and flowed over time, the presidency has played an increasing role in American political life since the beginning of the 20th century, carrying over into the 21st century with some expansions during the presidencies of Presidency of Franklin D. Roosevelt, Franklin D. Roosevelt and Presidency of George W. Bush, George W. Bush. In modern times, the president is one of the world's most powerful political figures and the leader of the world's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Board Of The United States Navy
The General Board of the United States Navy was an advisory body of the United States Navy, somewhat akin to a naval general staff. The General Board was established by general order 544, issued on March 13, 1900 by Secretary of the Navy John Davis Long. The order was officially recognized by Congress in 1916. The General Board was disbanded in 1951. Origins "The war with Spain had underlined the need for adequate staff work and the success of the War Board had pointed the way for the future. Among the most persistent advocates of a general staff for the Navy was Captain Henry C. Taylor. He had first laid plans for such a staff before Roosevelt in May 1897; now in 1900 he brought the idea once more to the attention of Secretary Long. Long, however, was reluctant to risk a fight with his entrenched bureau chiefs, hesitant about allowing the professional officers wide powers outside civilian control, and rightly dubious whether Congress could be brought to approve the sche ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BuShips
The United States Navy's Bureau of Ships (BuShips) was established by Congress on 20 June 1940, by a law which consolidated the functions of the Bureau of Construction and Repair (BuC&R) and the Bureau of Engineering (BuEng). The new bureau was to be headed by a chief and deputy-chief, one selected from the Engineering Corps (Marine Engineer) and the other from the Construction Corps (Naval Architect). The chief of the former Bureau of Engineering, Rear Admiral Samuel M. "Mike" Robinson, was named BuShips' first chief, while the former chief of the Bureau of Construction & Repair, Rear Admiral Alexander H. Van Keuren, was named as BuShips' first Deputy-Chief. The bureau's responsibilities included supervising the design, construction, conversion, procurement, maintenance, and repair of ships and other craft for the Navy; managing shipyards, repair facilities, laboratories, and shore stations; developing specifications for fuels and lubricants; and conducting salvage operations. B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
