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A sentry gun is a weapon that is automatically aimed and fired at targets that are detected by sensors. The earliest functioning military sentry guns were the close-in weapon systems point-defense weapons, such as the Phalanx CIWS, used for detecting and destroying short range incoming missiles and enemy aircraft, first used exclusively on naval assets, and now also as land-based defenses. [1]
The Samsung SGR-A1 is a South Korean military robot sentry designed to replace human counterparts in the demilitarized zone at the South and North Korean border. It is a stationary system made by Samsung defense subsidiary Samsung Techwin.
In 2007, the Israeli military deployed the Sentry Tech system, dubbed as the Roah-Yora (Sees-Fires) by the IDF along the Gaza border fence with pillboxes placed at intervals of some hundreds of meters. The 4-million USD (3.35 million Euro) system was completed in late spring of 2008. [2] The weapon system mounts a .50BMG automated M2 Browning machine gun and a SPIKE guided missile in each pillbox [3] covered by an opaque protective shield. The weapon is operated by one soldier and fed information from cameras, long range electro-optical sensors, ground sensors, crewed aircraft, and overhead drones, as well as radar. Connected via fiber optics to a remote operator station and a command-and-control center, each machine gun-mounted station serves as a type of robotic sniper, capable of enforcing a nearly 1,500-meter-deep area of denial. The gun is based on the Samson Remote Controlled Weapon Station. [4] [3] The weapon is capable of acquiring targets and maintaining a firing solution independently, but still requires human input to fire or release ordnance.
Dozens of people have been shot with the Sentry Tech system. The first reported killing of an individual appears to have taken place during Operation Cast Lead in December 2008. [3] According to Israeli sources, the process to authorize a kill is "complex" but can still be carried out in under two minutes. The same sources report that the weapons are mainly used for "warning shots" if they are fired at all, since the mere opening of the protective dome is often enough to intimidate any potential contacts into retreat.
In December 2010, the South Korean firm DoDAAM unveiled the Super aEgis II, [5] an automated turret-based weapon platform that uses thermal imaging to lock onto vehicles [6] or humans up to 3 km away. It is able to function during nighttime and is unaffected by weather conditions. [7] The system gives a verbal warning before firing, and though it is capable of firing automatically, the company reports that all of its customers have configured it to require human confirmation. It is used at various facilities in Qatar and the United Arab Emirates, including Abu Dhabi, among other places, and has been tested in the Korean Demilitarized Zone. [6]
Specific systems
An autonomous robot is a robot that acts without recourse to human control. The first autonomous robots environment were known as Elmer and Elsie, which were constructed in the late 1940s by W. Grey Walter. They were the first robots in history that were programmed to "think" the way biological brains do and meant to have free will. Elmer and Elsie were often labeled as tortoises because of how they were shaped and the manner in which they moved. They were capable of phototaxis which is the movement that occurs in response to light stimulus.
The Phalanx CIWS is an automated gun-based close-in weapon system to defend military watercraft automatically against incoming threats such as aircraft, missiles, and small boats. It was designed and manufactured by the General Dynamics Corporation, Pomona Division, later a part of Raytheon. Consisting of a radar-guided 20 mm (0.8 in) Vulcan cannon mounted on a swiveling base, the Phalanx has been used by the United States Navy and the naval forces of 15 other countries. The U.S. Navy deploys it on every class of surface combat ship, except the Zumwalt-class destroyer and San Antonio-class amphibious transport dock. Other users include the British Royal Navy, the Royal Australian Navy, the Royal New Zealand Navy, the Royal Canadian Navy, and the U.S. Coast Guard.
The Merkava is a series of main battle tanks used by the Israel Defense Forces (IDF) and the backbone of the IDF's Armored Corps. Current iterations of this tank are considered broadly equivalent to the capabilities of the M1 Abrams, Leopard 2 and the Challenger 2. The current iteration of this vehicle also shares the same MTU EuroPowerPack powerplant as a number of other MBT platforms.
Military robots are autonomous robots or remote-controlled mobile robots designed for military applications, from transport to search & rescue and attack.
The M2 machine gun or Browning .50 caliber machine gun is a heavy machine gun that was designed near the end of World War I by John Browning. While similar to Browning's M1919 Browning machine gun, which was chambered for the .30-06 cartridge, the M2 uses Browning's larger and more powerful .50 BMG cartridge. The design has had many designations; the official U.S. military designation for the infantry type is Browning Machine Gun, Cal. .50, M2, HB, Flexible. It has been used against infantry, light armored vehicles, watercraft, light fortifications, and low-flying aircraft.
A close-in weapon system is a point-defense weapon system for detecting and destroying short-range incoming missiles and enemy aircraft which have penetrated the outer defenses, typically mounted on a naval ship. Nearly all classes of larger modern warships are equipped with some kind of CIWS device.
The M230 Cannon is a 30 mm (30×113 mm), single-barrel electrically-driven autocannon, using external electrical power to cycle the weapon between shots. It was designed and manufactured originally by Hughes Helicopters in Culver City, California. As of 2019, it is produced by Northrop Grumman Innovation Systems.
An unmanned ground vehicle (UGV) is a vehicle that operates while in contact with the ground and without an onboard human presence. UGVs can be used for many applications where it may be inconvenient, dangerous, or impossible to have a human operator present. Generally, the vehicle will have a set of sensors to observe the environment, and will either autonomously make decisions about its behavior or pass the information to a human operator at a different location who will control the vehicle through teleoperation.
The Type 730 is a Chinese seven-barrelled 30 mm Gatling gun/rotary cannon CIWS. It has a PLA Navy designation H/PJ12. It is mounted in an enclosed automatic turret and directed by radar, and electro-optical tracking systems. The maximum rate of fire is 5800 rd/m, and the effective range is up to 3 km.
The K21 is a South Korean infantry fighting vehicle. A replacement for the K200-series, it was formerly designated as K300 or XK21 KNIFV. The initial production began in 2009, with the Republic of Korea Army planning to field approximately 466 units. It is designed to effectively defeat other IFVs as heavily armed and armored as the BMP-3.
A Remote Controlled Weapon Station (RCWS), or Remotely Operated Weapon System (ROWS), also known as a Remote Weapon System (RWS), is a remotely operated weaponized system often equipped with fire-control system for light and medium-caliber weapons which can be installed on a ground combat vehicle or sea- and air-based combat platforms.
The Samson Remote Controlled Weapon Station (RCWS), also known as Katlanit is a remote weapon system (RWS) that enables a variety of devices to be operated automatically or by remote control, including 5.56 mm, 7.62 mm, and 12.7 mm .50 BMG machine guns, 40 mm automatic grenade launchers, anti-tank missiles and observation pods.
The SGR-A1 is a type of autonomous sentry gun that was jointly developed by Samsung Techwin and Korea University to assist South Korean troops in the Korean Demilitarized Zone. It is widely considered as the first unit of its kind to have an integrated system that includes surveillance, tracking, firing, and voice recognition. While units of the SGR-A1 have been reportedly deployed, their number is unknown due to the project being "highly classified".
A weapon mount is an assembly or mechanism used to hold a weapon onto a platform in order for it to function at maximum capacity. Weapon mounts can be broken down into two categories: static mounts and non-static mounts.
The Modular Advanced Armed Robotic System (MAARS) is a robot that is being developed by Qinetiq. A member of the TALON family, it will be the successor to the armed SWORDS robot. It has a different, larger chassis than the SWORDS robot, so has little physically in common with the SWORDS and TALON
The Fleet-class unmanned surface vessel, also called the Common Unmanned Surface Vessel (CUSV) and later the Mine Countermeasures Unmanned Surface Vehicle, is an unmanned surface vessel designed for the United States Navy to be deployed from Freedom and Independence-class littoral combat ships and intended to conduct mine and anti-submarine warfare missions. As of 2012 four units of the class have been built; the first was delivered to the U.S. Navy in 2008.
Lethal autonomous weapons (LAWs) are a type of autonomous military system that can independently search for and engage targets based on programmed constraints and descriptions. LAWs are also known as lethal autonomous weapon systems (LAWS), autonomous weapon systems (AWS), robotic weapons or killer robots. LAWs may operate in the air, on land, on water, underwater, or in space. The autonomy of current systems as of 2018 was restricted in the sense that a human gives the final command to attack—though there are exceptions with certain "defensive" systems.
The International Committee for Robot Arms Control (ICRAC) is a "not-for-profit association committed to the peaceful use of robotics in the service of humanity and the regulation of robot weapons." It is concerned about the dangers that autonomous military robots, or lethal autonomous weapons, pose to peace and international security and to civilians in war.
XTR-101 and XTR-102 are a pair of automatic close-defense 20mm remote weapon systems produced by the National Chung-Shan Institute of Science and Technology of Taiwan. The XTR-101 features a single T-75 cannon while the XTR-102 features two of them mounted side by side. Along with associated sensors, power, and command and control equipment, the system forms a Short-Range Automated Defense Weapon System (SADWS).
The GOKDENIZ complex along with Aselsan ATOM 35mm airburst ammunition is an all-weather-capable Turkish 35 mm dual barrel close-in weapon system (CIWS) developed by Aselsan. It is a CIWS variant of KORKUT Self-propelled anti-aircraft gun.