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Italian Destroyer Caio Duilio
''Caio Duilio'' is a destroyer of the Italian Navy. She and her sister form the ''Andrea Doria'' class; in turn these two ships, and the French vessels and , belong to the . ''Caio Duilio ''is marked by hull number D 554 according to NATO classification. History Background The ship takes her name from the 3rd century BC Roman leader and admiral Gaius Duilius (''Caio Duilio'' in Italian). Duilius ordered the construction of 120 ships that were armed with hooked bridges called corvus, Latin for “crow”. This innovation allowed the Romans to defeat the powerful enemy fleet of Carthage transforming the naval battle into a melee combat. After the victory over the Carthaginians at the Battle of Mylae in 260 BC, Duilius was honored with a triumphal parade and the erection in the Roman Forum of a column adorned with the beaks of captured Carthaginian warships; the column both became his symbol and appears today in the coat of arms of the ship. The destroyer ''Caio Duilio'' i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaius Duilius
Gaius Duilius ( 260–231 BC) was a Roman general and statesman. As consul in 260 BC, during the First Punic War, he won Rome's first ever victory at sea by defeating the Carthaginians at the Battle of Mylae. He later served as censor in 258, and was appointed dictator to hold elections in 231, but never held another command. Background Gaius Duilius, whose father and grandfather were both named Marcus Duilius, belonged to an undistinguished family. One Caeso Duilius is recorded as consul in 336 BC, but the surname is otherwise only known historically and reliably from a few minor magistrates in the fourth century BC. Career Naval victory Duilius was one of the consuls for the year 260 BC, and was initially appointed to command Rome's land forces in Sicily against Carthage, as part of the First Punic War. His colleague in office, Gnaeus Cornelius Scipio, held charge of the fleet. The Romans built 120 warships and despatched them to Sicily in 260 BC for their crews to ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LM 2500
The General Electric LM2500 is an industrial and marine gas turbine produced by GE Aviation. The LM2500 is a derivative of the General Electric CF6 aircraft engine. As of 2004, the U.S. Navy and at least 29 other navies had used a total of more than one thousand LM2500/LM2500+ gas turbines to power warships. Other uses include hydrofoils, hovercraft and fast ferries. In 2012, GE developed an FPSO version to serve the oil and gas industry's demand for a lighter, more compact version to generate electricity and drive compressors to send natural gas through pipelines. Design and development The LM2500 was first used on the US Navy in 1969, after the original FT-4 gas turbines experienced many technical problems. Later, they were used in US Navy warships in the of destroyers and the related , which were constructed from 1970. In this configuration it was rated to . This configuration was subsequently used into the 1980s in the s, and s. It was also used by one of People's R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EMPAR
EMPAR (European Multifunction Phased Array Radar) is a rotating C band multifunction passive electronically scanned array radar that reached IOC in 2006 and was initially built by Selex ES (previously SELEX Sistemi Integrati, since 2016 merged in Finmeccanica, then Leonardo S.p.A.). It is designed to be the principal radar system aboard naval vessels of medium and large sizes. The radar offers full volumetric search coverage, low altitude and surface search, the tracking of multiple targets, and the capability to uplink information for missile guidance. Details EMPAR's principal function is 3D volumetric air search, providing a bearing, range and altitude for air traffic out to ranges of . It is capable of tracking aircraft or smaller targets such as missiles. The system employs a single narrow beam for transmission, plus multiple beams for reception. These can be steered electronically, allowing the EMPAR to scan very rapidly across a wide angle of bearing and/or elevation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G Band (NATO)
The NATO G band is the obsolete designation given to the radio frequencies from 4 000 to 6 000 MHz (equivalent to wavelengths between 7.5 and 5 cm) during the Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ... period. Since 1992 frequency allocations, allotment and assignments are in line to NATO Joint Civil/Military Frequency Agreement (NJFA). However, in order to identify military radio spectrum requirements, e.g. for crises management planning, training, Electronic warfare activities, or in military operations, this system is still in use. References Radio spectrum {{Wireless-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phased Array
In antenna (radio), antenna theory, a phased array usually means an electronically scanned array, a computer-controlled Antenna array, array of antennas which creates a radio beam, beam of radio waves that can be electronically steered to point in different directions without moving the antennas. In a phased array, the power from the transmitter is fed to the radiating elements through devices called ''phase shifters'', controlled by a computer system, which can alter the phase or signal delay electronically, thus steering the beam of radio waves to a different direction. Since the size of an antenna array must extend many wavelengths to achieve the high gain needed for narrow beamwidth, phased arrays are mainly practical at the high frequency end of the radio spectrum, in the ultrahigh frequency, UHF and microwave bands, in which the operating wavelengths are conveniently small. Phased arrays were originally invented for use in military radar systems, to detect fast moving pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SELEX Sensors And Airborne Systems
Selex ES was a subsidiary of Finmeccanica, active in the electronics and information technology business, based in Italy and the UK, and formed in January 2013, following Finmeccanica's decision to combine its existing SELEX Elsag and SELEX Sistemi Integrati businesses into SELEX Galileo, the immediate predecessor of Selex ES. From 1 January 2016, the activities of Selex ES merged into Leonardo-Finmeccanica's Electronics, Defence and Security Systems Sector becoming Leonardo S.p.A. Selex ES's activities had been organised in three Divisions within the sector: Airborne & Space Systems, Land and Naval Defence Electronics and Security and Information Systems. History Predecessor companies In July 2003 Finmeccanica and BAE Systems signed a joint venture agreement with the intention of merging their avionics, C4ISR and communications businesses to create three joint venture partnerships under the name Eurosystems. The difficulties of integrating the companies in this way howeve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
F Band (NATO)
The NATO F band is the obsolete designation given to the radio frequencies from 3,000 to 4,000 MHz (equivalent to wavelength In physics and mathematics, wavelength or spatial period of a wave or periodic function is the distance over which the wave's shape repeats. In other words, it is the distance between consecutive corresponding points of the same ''phase (waves ...s between 10 and 7.5 cm) during the cold war period. Since 1992, frequency allocations, allotment and assignments are in line with the NATO Joint Civil/Military Frequency Agreement (NJFA). However, in order to identify military radio spectrum requirements, e.g. for crisis management planning, training, electronic warfare activities, or in military operations, this system is still in use. References Radio spectrum {{Wireless-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
E Band (NATO)
The NATO E band is a designation given to the radio frequencies from 2000 to 3000 MHz (equivalent to wavelength In physics and mathematics, wavelength or spatial period of a wave or periodic function is the distance over which the wave's shape repeats. In other words, it is the distance between consecutive corresponding points of the same ''phase (waves ...s between 15 and 10 cm) during the cold war period. Since 1992, detailed frequency allocations, allotment and assignments are in line with the NATO Joint Civil/Military Frequency Agreement (NJFA). However, in order to generically identify military radio spectrum requirements, e.g. for crisis management planning, training, electronic warfare activities, radar or in military operations, the NATO band system is often used. References {{EMSpectrum Radio spectrum Military equipment of NATO ... [...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] |
San Marco Regiment
The 1st San Marco Regiment (Italian: ''1° Reggimento San Marco''), located in Brindisi, is an amphibious formation of the Italian Navy. They are the Italian marines. Until the middle of the 1990s the unit was known as the San Marco Battalion (''Battaglione San Marco''), until it was expanded beyond battalion size because of the new geopolitical situation after the end of the Cold War and an increasing number of international missions, after as the ''San Marco Regiment''. In 2013 it became part of the San Marco Marine Brigade as 1st San Marco Regiment. History Marines of Italy was created as ''Fanti da Mar'' in 1550 in the Republic of Venice. The San Marco Regiment traces its history back to the La Marina Regiment, formed in 1713. During the Wars of Italian Independence the Italian Marines were known as the Fanteria Real Marina, units of specially selected sailors who were skilled marksmen. The regiment also played an important role in Peking during the Boxer Rebellion and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bow Thruster
Manoeuvering thrusters (bow thrusters and stern thrusters) are transversal propulsion devices built into or mounted to either the Bow (watercraft), bow or stern (front or back, respectively) of a ship or boat to make it more manoeuvrable. Bow thrusters make docking easier, since they allow the captain to turn the vessel to port (nautical), port or starboard side, without using the main propulsion mechanism which requires some Steering#Watercraft, forward motion for turning; The effectiveness of a thruster is curtailed by any forward motion due to the Coandă effect#Problems caused, Coandă effect. A stern thruster is of the same principle, fitted at the stern. Sufficiently large vessels often have multiple bow thrusters and stern thrusters. Tunnel thrusters Large vessels usually have one or more tunnel thrusters built into the bow, below the waterline. An impeller in the tunnel can create thrust in either direction that makes the ship turn. Most tunnel thrusters are driven by e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propeller
A propeller (often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon a working fluid such as water or air. Propellers are used to pump fluid through a pipe or duct, or to create thrust to propel a boat through water or an aircraft through air. The blades are shaped so that their rotational motion through the fluid causes a pressure difference between the two surfaces of the blade by Bernoulli's principle which exerts force on the fluid. Most marine propellers are screw propellers with helical blades rotating on a propeller shaft (ship), propeller shaft with an approximately horizontal axis. History Early developments The principle employed in using a screw propeller is derived from stern sculling. In sculling, a single blade is moved through an arc, from side to side taking care to keep presenting the blade to the wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
