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Heavy Cruisers
A heavy cruiser was a type of cruiser, a naval warship designed for long range and high speed, armed generally with naval guns of roughly 203 mm (8 inches) in calibre, whose design parameters were dictated by the Washington Naval Treaty of 1922 and the London Naval Treaty of 1930. Heavy cruisers were generally larger, more heavily armed and more heavily armoured than light cruisers while being smaller, faster, and more lightly armed and armoured than battlecruisers and battleships. Heavy cruisers were not considered capital ships, unlike battlecruisers, battleships, and fleet carriers. Heavy cruisers were assigned a variety of roles ranging from commerce raiding to serving as 'cruiser-killers,' i.e. hunting and destroying similarly sized ships. The heavy cruiser is part of a lineage of ship design from 1915 through the early 1950s, although the term "heavy cruiser" only came into formal use in 1930. The heavy cruiser's immediate precursors were the light cruiser design ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Frobisher
Two ships of the Royal Navy have borne the name HMS ''Frobisher'', after the Elizabethan explorer and adventurer Martin Frobisher: *HMS ''Frobisher'' was renamed in 1915, before being launched the following year as an Improved ''Marksman''-class destroyer leader. * was a heavy cruiser launched in 1920. She served in the Second World War World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ... and was broken up in 1949. {{DEFAULTSORT:Frobisher, Hms Royal Navy ship names ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Casemate
A casemate is a fortified gun emplacement or armoured structure from which guns are fired, in a fortification, warship, or armoured fighting vehicle.Webster's New Collegiate Dictionary When referring to antiquity, the term "casemate wall" means a double city wall with the space between the walls separated into chambers, which could be filled up to better withstand battering rams in case of siege (see .) In its original early modern meaning, the term referred to a vaulted chamber in a fort, which may have been used for storage, accommodation, or artillery which could fire through an opening or embrasure. Although the outward faces of brick or masonry casemates proved vulnerable to advances in artillery performance, the invention of reinforced concrete allowed newer designs to be produced well into the 20th century. With the introduction of ironclad warships, the definition was widened to include a protected space for guns in a ship, either within the hull or in the low ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pre-dreadnought Battleship
Pre-dreadnought battleships were sea-going battleships built from the mid- to late- 1880s to the early 1900s. Their designs were conceived before the appearance of in 1906 and their classification as "pre-dreadnought" is retrospectively applied. In their day, they were simply known as "battleships" or else more rank-specific terms such as "first-class battleship" and so forth. The pre-dreadnought battleships were the pre-eminent warships of their time and replaced the ironclad warship, ironclad battleships of the 1870s and 1880s. In contrast to the multifarious development of ironclads in preceding decades, the 1890s saw navies worldwide start to build battleships to a common design as dozens of ships essentially followed the design of the Royal Navy's . Built from steel, protected by compound armour, compound, nickel steel or case-hardening, case-hardened steel armor, pre-dreadnought battleships were driven by coal-fired boilers powering triple-expansion steam engine, compou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protected Cruiser
Protected cruisers, a type of cruiser of the late 19th century, took their name from the armored deck, which protected vital machine-spaces from fragments released by explosive shells. Protected cruisers notably lacked a belt of armour along the sides, in contrast to armored cruisers which carried both deck and belt armour. Outside of a handful of very large designs in the major navies (which preceded the revival of armored cruisers), the majority of protected cruisers were of 'second-' or 'third-class' types, lighter in displacement and mounting fewer and/or lighter guns than armored cruisers. By the early 20th-century, with the advent of increasingly lighter yet stronger armour, even smaller vessels could afford some level of both belt and deck armour. In the place of protected cruisers, these new ' light armored cruisers' would evolve into light cruisers and heavy cruisers, the former especially taking on many of the roles originally envisioned for protected cruisers. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belt Armor
Belt armor is a layer of heavy metal armor plated onto or within the outer hulls of warships, typically on battleships, battlecruisers and cruisers, and aircraft carriers. The belt armor is designed to prevent projectiles from penetrating to the heart of a warship. When struck by an artillery shell or underwater torpedo, the belt armor either absorbs the impact and explosion with its sheer thickness and strength, or else uses sloping to redirect the projectile and its blast downwards. Typically, the main armor belt covers the warship from its main deck down to some distance below the waterline. If, instead of forming the outer hull, the armor belt is built inside the hull, it is installed at a sloped angle for improved protection, as described above. The torpedo bulkhead Frequently, the main belt's armor plates were supplemented with a torpedo bulkhead spaced several meters behind the main belt, designed to maintain the ship's watertight integrity even if the main belt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Armored Cruiser
The armored cruiser was a type of warship of the late 19th and early 20th centuries. It was designed like other types of cruisers to operate as a long-range, independent warship, capable of defeating any ship apart from a pre-dreadnought battleship and fast enough to outrun any battleship it encountered. For many decades, naval technology had not advanced far enough for designers to produce a cruiser that combined an armored belt with the long-range and high speed required to fulfill its mission. For this reason, beginning in the 1880s and 1890s, many navies preferred to build protected cruisers, which only relied on a lightly armored deck (ship), deck to protect the vital parts of the ship. However, by the late 1880s, the development of modern rapid-fire breech-loading cannons and high-explosive shells made the reintroduction of side armor a necessity. The invention of Case-hardening, case-hardened armor in the mid-1890s offered effective protection with less weight than previou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Hawkins
HMS ''Hawkins'' was the lead ship of her class of five heavy cruisers built for the Royal Navy during the First World War, although the ship was not completed until 1919. She was assigned to the China Station until 1928 and was briefly assigned to the Atlantic Fleet in 1929–1930, always serving as a flagship, before being placed in reserve. ''Hawkins'' was recommissioned in 1932 for service on the East Indies Station, but returned to reserve three years later. The ship was disarmed in 1937–1938 and converted into a cadet training ship in 1938. When the Second World War began in 1939, the Royal Navy decided to reconvert her back into a heavy cruiser and her original armament was reinstalled. ''Hawkins'' reentered service in early 1940 and was assigned to the South Atlantic Division where she patrolled for Axis commerce raiders and escorted convoys. The following year, she was transferred to the Indian Ocean where she played a small role in the East African campaign in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS Tennessee (ACR-10)
The second USS ''Tennessee'' (ACR-10), also referred to as "Armored Cruiser No. 10", and later renamed ''Memphis'', was a United States Navy armored cruiser, the lead ship of her Tennessee class cruiser, class. Construction and commissioning ''Tennessee'' was Keel-laying, laid down by the Cramp Shipbuilding Company of Philadelphia, Pennsylvania, on 20 June 1903, Ceremonial ship launching, launched on 3 December 1904, Ship sponsor, sponsored by Ms. Annie K. Frazier (daughter of Governor of Tennessee, Governor James B. Frazier of Tennessee and later the foundress of the Society of Sponsors of the United States Navy), and Ship commissioning, commissioned at the Philadelphia Navy Yard on 17 July 1906, Captain (United States O-6), Captain Albert Gleaves Berry in command. Operational career The new armored cruiser departed Hampton Roads on 8 November 1906 as escort for in which President of the United States, President Theodore Roosevelt had embarked for a cruise to Panama to check ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electronic Countermeasure
An electronic countermeasure (ECM) is an electrical or electronic device designed to trick or deceive radar, sonar, or other detection systems, like infrared (IR) or lasers. It may be used both offensively and defensively to deny targeting information to an enemy. The system may make many separate targets appear to the enemy, or make the real target appear to disappear or move about randomly. It is used effectively to protect aircraft from guided missiles. Most air forces use ECM to protect their aircraft from attack. It has also been deployed by military ships and recently on some advanced tanks to fool laser/IR guided missiles. It is frequently coupled with stealth advances so that the ECM systems have an easier job. Offensive ECM often takes the form of jamming. Self-protecting (defensive) ECM includes using blip enhancement and jamming of missile terminal homers. History The first example of electronic countermeasures being applied in a combat situation took place durin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radar
Radar is a system that uses radio waves to determine the distance ('' ranging''), direction ( azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain. The term ''RADAR'' was coined in 1940 by the United States Navy as an acronym for "radio detection and ranging". The term ''radar'' has since entered English and other languages as an anacronym, a common noun, losing all capitalization. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwave 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire-control System
A fire-control system (FCS) is a number of components working together, usually a gun data computer, a director and radar, which is designed to assist a ranged weapon system to target, track, and hit a target. It performs the same task as a human gunner firing a weapon, but attempts to do so faster and more accurately. Naval fire control Origins The original fire-control systems were developed for ships. The early history of naval fire control was dominated by the engagement of targets within visual range (also referred to as direct fire). In fact, most naval engagements before 1800 were conducted at ranges of . Even during the American Civil War, the famous engagement between and was often conducted at less than range. Rapid technical improvements in the late 19th century greatly increased the range at which gunfire was possible. Rifled guns of much larger size firing explosive shells of lighter relative weight (compared to all-metal balls) so greatly increased the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
