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USS Freedom (LCS-1)
USS ''Freedom'' (LCS-1) is the lead ship of the for the United States Navy. She is the third vessel to be so named after the concept of freedom. She is the design competitor produced by the Lockheed Martin consortium, in competition with the General Dynamics–designed . She was officially accepted by the Supervisor of Shipbuilding Gulf Coast, on behalf of the US Navy, from the Lockheed Martin/Marinette Marine/Gibbs and Cox team, in Marinette, Wisconsin, on 18 September 2008. She is designed for a variety of missions in shallow waters, minesweeping and humanitarian relief, capable against submarines and small ships, but not designed to take on large warships. The ship is a semi-planing monohull design capable of over . Commissioned in Milwaukee, Wisconsin, on 8 November 2008, ''Freedom'' was home-ported in San Diego, and assigned to Littoral Combat Ship Squadron One. On 20 June 2020, the US Navy announced that they would be taking ''Freedom'' out of commission in March ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II Ship Camouflage Measures Of The United States Navy
In 1935, the United States Navy Naval Research Laboratory began studies and tests on low visibility ship camouflage. Research continued through World War II to (1) reduce visibility by painting vertical surfaces to harmonize with the horizon and horizontal surfaces to blend with the sea, or (2) confuse identity and course by painting obtrusive patterns on vertical surfaces. Some camouflage methods served both purposes. American captains were permitted less freedom of interpretation with these schemes (other than Measure 12 Modified) than their British Commonwealth counterparts applied to Admiralty camouflage schemes.Raven, 2012. Early measures With the likelihood of the United States entering the war, and after experiments with various paint schemes conducted in association with the 1940 Fleet Problem (exercise), the Bureau of Ships (BuShips) directed in January 1941 that the peacetime color of overall #5 Standard Navy Gray, a light gloss shade with a linseed oil base, be r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea State
In oceanography, sea state is the general condition of the free surface on a large body of water—with respect to wind waves and swell—at a certain location and moment. A sea state is characterized by statistics, including the wave height, period, and spectrum. The sea state varies with time, as the wind and swell conditions change. The sea state can be assessed either by an experienced observer (like a trained mariner) or by using instruments like weather buoys, wave radar or remote sensing satellites. In the case of buoy measurements, the statistics are determined for a time interval in which the sea state can be considered to be constant. This duration has to be much longer than the individual wave period, but shorter than the period in which the wind and swell conditions can be expected to vary significantly. Typically, records of one hundred to one thousand wave periods are used to determine the wave statistics. The large number of variables involved in creating and des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SH-60 Seahawk
The Sikorsky SH-60/MH-60 Seahawk (or Sea Hawk) is a twin turboshaft engine, multi-mission United States Navy helicopter based on the United States Army UH-60 Black Hawk and a member of the Sikorsky S-70 family. The most significant modifications are the folding main rotor and a hinged tail to reduce its footprint aboard ships. The U.S. Navy uses the H-60 airframe under the model designations SH-60B, SH-60F, HH-60H, MH-60R, and MH-60S. Able to deploy aboard any air-capable frigate, destroyer, cruiser, fast combat support ship, expeditionary transfer dock, amphibious assault ship, littoral combat ship or aircraft carrier, the Seahawk can handle anti-submarine warfare (ASW), anti-surface warfare (ASUW), naval special warfare (NSW) insertion, search and rescue (SAR), combat search and rescue (CSAR), vertical replenishment (VERTREP), and medical evacuation (MEDEVAC). Design and development Origins During the 1970s, the U.S. Navy began looking for a new helicopter to replace the K ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surface-to-Air Missile
A surface-to-air missile (SAM), also known as a ground-to-air missile (GTAM) or surface-to-air guided weapon (SAGW), is a missile designed to be launched from the ground to destroy aircraft or other missiles. It is one type of anti-aircraft system; in modern armed forces, missiles have replaced most other forms of dedicated anti-aircraft weapons, with anti-aircraft guns pushed into specialized roles. The first attempt at SAM development took place during World War II, but no operational systems were introduced. Further development in the 1940s and 1950s led to operational systems being introduced by most major forces during the second half of the 1950s. Smaller systems, suitable for close-range work, evolved through the 1960s and 1970s, to modern systems that are man-portable. Shipborne systems followed the evolution of land-based models, starting with long-range weapons and steadily evolving toward smaller designs to provide a layered defence. This evolution of design increasin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RIM-116 Rolling Airframe Missile
The RIM-116 Rolling Airframe Missile (RAM) is a small, lightweight, infrared homing surface-to-air missile in use by the German, Japanese, Greek, Turkish, South Korean, Saudi Arabian, Egyptian, Mexican, UAE, and U.S. Navies. It was originally intended and used primarily as a point-defense weapon against anti-ship missiles. As its name indicates, RAM rolls as it flies. The missile must roll during flight because the RF tracking system uses a two-antenna interferometer that can measure phase interference of the electromagnetic wave in one plane only. The rolling interferometer permits the antennas to look at all planes of incoming energy. In addition, because the missile rolls, only one pair of steering canards is required. , it is the only U.S. Navy missile to operate in this manner. The Rolling Airframe Missiles, together with the Mk 49 Guided Missile Launching System (GMLS) and support equipment, make up the RAM Mk 31 Guided Missile Weapon System (GMWS). The Mk-144 Guided M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mk44 Bushmaster II
The Mk44 Bushmaster II is a 30 mm chain gun manufactured by Northrop Grumman. It is a derivative of the 25 mm M242 Bushmaster, and uses 70% of the same parts as the M242 while increasing the firepower by as much as 50% with the 20% increase in caliber size. The barrel is chromium-plated for extended life. The gun uses standard GAU-8 Avenger ammunition that is available in API (Armor-Piercing Incendiary), HEI (High-Explosive Incendiary) and APFSDS-T (Armor-Piercing Fin-Stabilized Discarding Sabot-Tracer) variants. The gun can be converted to a caliber of 40x180 mm, which involves changing the barrel and a few key parts, to use the SuperShot 40 cartridge. It can also be converted to use the 30x170 mm RARDEN cartridge. History The Bushmaster II is the standard primary armament of the Bionix-II AFV currently in service with the Singapore Army, the KTO Rosomak in Polish service, and the CV90 AFVs in Finnish, Norwegian and Swiss service. Although the United States Air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M2 Browning
The M2 machine gun or Browning .50 caliber machine gun (informally, "Ma Deuce") is a heavy machine gun that was designed towards the end of World War I by John Browning. Its design is similar to Browning's earlier M1919 Browning machine gun, which was chambered for the .30-06 cartridge. The M2 uses Browning's larger and more powerful .50 BMG (12.7 mm) cartridge. The design has had many designations; the official U.S. military designation for the current infantry type is Browning Machine Gun, Cal. .50, M2, HB, Flexible. It is effective against infantry, unarmored or lightly armored vehicles and boats, light fortifications, and low-flying aircraft. The gun has been used extensively as a vehicle weapon and for aircraft armament by the United States since the 1930s. It was heavily used during World War II, the Korean War, the Vietnam War, the Falklands War, the Soviet–Afghan War, the Gulf War, the Iraq War, and the War in Afghanistan. It is the primary heavy machine gun of NATO ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bofors 57 Mm L/70 Naval Artillery Gun
Bofors 57 mm Naval Automatic Gun L/70 ( sv, 57 mm sjöautomatkanon L/70 (''57 mm SAK 70'')), among other names (see Names), is a series of dual-purpose naval guns designed and produced by the Swedish arms manufacturer AB Bofors (since March 2005 part of BAE Systems AB), designed in the late 1960s as a replacement design for the twin barreled Bofors 57 mm Naval Automatic Gun L/60. The gun is remotely controlled by a fire-control computer but can as a redundancy measure also be operated manually by crew using instrument panels either on or in direct contact with the gun. The gun has been upgraded and improved several times: *Mk1 – The baseline Mark 1 variant began production in 1970 and was initially used to equip smaller coastal patrol craft and fast attack craft. *Mk2 – The improved Mark 2 variant came in 1981 and drastically lowered the weight as well as introduced new servo stabilizers. *Mk3 – The improved Mark 3 variant came in 1995 and primarily features the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BAE Systems Land And Armaments
BAE Systems Platforms & Services is a wholly owned subsidiary of BAE Systems Inc. and is a large provider of tracked and wheeled armored combat vehicles, naval guns, naval ship repair and modernization, artillery and missile launching systems, advanced precision strike munitions and ordnance, and other technologies for U.S. and international customers. It was created on 24 June 2005, following the completion of BAE Systems' acquisition of United Defense in 2004 and its merger with BAE Systems Land Systems. In 2007 BAE Systems acquired Armor Holdings adding to the size of Land & Armaments significantly. Until April 2003 BAE Systems was a relatively small player in the land systems industry. As a result of the 2004 purchase of Alvis Vickers, the aforementioned 2004 acquisition of United Defense, and the acquisition of Armor Holdings in 2007, it is now one of the largest land systems defence contractors in the world. History BAE Systems was formed in 1999 by the merger of Bri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terma A/S
Terma A/S is a Danish weapon and aerospace manufacturer for both civilian and military applications, and is owned by the Danish company Thrige Holding A/S. It is Denmark's largest company within the aerospace and weapon industry, employing approximately 1,100 people worldwide. The company was founded in 1949 by Orla and Svend Aage Jørgensen; it originally focused on the production of thermometers and manometers for ships and various other metal components. Following its purchase by Thorkild Juncker, Terma A/S refocused itself on the production of electronic measuring instruments along with early radar systems; it expanded rapidly during the 1950s and 1960s. The firm became a leader in defence electronics, and had diversified into air defense systems, aircraft avionics, and missiles by 1970. It continued to grow, acquiring various other Danish defense firms during the 1990s. In 1999, Terma A/S acted at the prime contractor for the Ørsted satellite, the first Danish satellite to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electronic Support Measures
In military telecommunications, electronic support (ES) or electronic support measures (ESM) gather intelligence through passive "listening" to electromagnetic radiations of military interest. They are an aspect of electronic warfare involving actions taken under direct control of an operational commander to detect, intercept, identify, locate, record, and/or analyze sources of radiated electromagnetic energy for the purposes of immediate threat recognition (such as warning that fire control RADAR has locked on a combat vehicle, ship, or aircraft) or longer-term operational planning.Polmar, Norman "The U. S. Navy Electronic Warfare (Part 1)" ''United States Naval Institute Proceedings'' October 1979 p.137 Thus, electronic support provides a source of information required for decisions involving electronic protection (EP), electronic attack (EA), avoidance, targeting, and other tactical employment of forces. Electronic support data can be used to produce signals intelligence (SIG ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argon ST
Argon ST is a subsidiary of The Boeing Company headquartered in Fairfax, Virginia, United States, that specializes in systems engineering and provides C4ISR (command, control, communications, computers, intelligence, surveillance, and reconnaissance) products. Argon ST's efforts include developing systems for signal intercept and identification, airborne imaging systems, threat warning systems, electronic intelligence, active electronic warfare systems, communications reconnaissance systems, torpedo countermeasures systems, imaging systems, communication systems, wireless networks and navigation systems. Argon ST systems support a full range of military and strategic units including surface and sub-surface, airborne, and land-based platforms serving defense, homeland security, and international customer needs. Structure Argon ST is a wholly owned, non-fully integrated subsidiary of The Boeing Company. It shares its business area with Digital Receiver Technologies (DRT), anoth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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