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- 9-11 Conspiracy Theories [r]: Alternative theories as to the conspiracy that led to the attacks of 9-11. [e]
- AH-1 Cobra [r]: The first purpose-built U.S. attack helicopter, introduced by the U.S. Army in the Vietnam War; the U.S. Marine Corps still operates a much-modified version [e]
- AN- [r]: U.S. military nomenclature for electronic equipment, following the Joint Electronics Type Designation System [e]
- Acoustic energy [r]: Energy propagated as pressure waves, through elastic media such as air or water. Hearing is the detection of acoustic energy within the frequency range of the animal detecting the energy [e]
- Air Traffic Control [r]: A system for managing the safe operation of large numbers of aircraft in shared airspace, day or night, and in almost all weather, keeping the aircraft managed by positive control from a network of interconnected ground stations [e]
- Apollo Command-Service Module [r]: Three-man spacecraft built for NASA by North American Aviation, and one of the two spacecraft that were utilized for the Apollo program, along with the Lunar Module, to land astronauts on the Moon. [e]
- Astronomy [r]: The study of objects and processes in the observable universe, e.g. stars, planets, comets or asteroids. [e]
- Automatic Identification System [r]: A system, aboard ships and boats, that combines marine radio transmitters and receivers, Global Navigation Satellite System receivers, and computer control into a self-organizing, mobile network in which vessels are inform nearby traffic, potential collision hazards, and navigational information [e]
- Avionics [r]: Electronic components and subsystems integrated into the core functions of an aircraft. [e]
- Azimuth [r]: The direction to a target or other point of interest, either relative to an observer or stated with respect to an absolute reference such as North [e]
- C-130 Hercules [r]: An extremely successful (in production for over 50 years) medium-range military transport aircraft with an extremely wide range of variants, including tanker, special operations and C3I-ISR, and ski-equipped LC-130. [e]
- CH-47 Chinook [r]: Medium transport helicopter developed by the U.S. Army and used by a wide range of countries [e]
- COSPAS-SARSAT [r]: Worldwide system of multinational satellites in geosynchronous or low earth orbits, receiving stations, and search and rescue mission control systems that detect the emergency messages from emergency position indicating radio beacons (EPIRB) [e]
- Carrier wave [r]: In electromagnetic signal transmission, the basic information-free signal onto which information is modulated. [e]
- Compass [r]: A device which has the basic function of displaying a bearing for navigation. [e]
- E-2 Hawkeye [r]: Designed for the U.S. Navy and used by several other countries, this radar aircraft minimally carries out the airborne early warning function and a modest airborne warning and control system (AWACS), the latter enhanced by "virtual workstations" on linked ships [e]
- Electromagnetic radiation [r]: a collection of electromagnetic waves, usually of different wavelengths. [e]
- F-18 Super Hornet [r]: A new generation of carrier-based fighter beyond the F-18 Hornet, this evolution provides an architecture with even greater expansion, especially with the AN/APG-79 AESA radar, more powerful computers and communications, and a new engine with longer range. [e]
- Fast attack craft [r]: Small naval craft, used in coastal waters, which rely on speed and maneuverability to survive to deliver heavy weapons (e.g., torpedoes, anti-shipping missiles) against warships, or to make gunfire attacks on merchant ships and landing craft [e]
- Fixed-wing aircraft [r]: Vehicles that remain aloft using the lift from the flow of air over wings which are fixed in position, in relation to the rest of their structure. [e]
- Fratricide (military) [r]: The killing of one's brother, but in a military context, the killing of one's own forces ("friendly fire"). [e]
- Geography [r]: Study of the surface of the Earth and the activities of humanity upon it. [e]
- Global Navigation Satellite System [r]: A system which allows small electronic devices to determine their location (Longitude, Latitude, and Altitude) as well as time with an accuracy of up to a few centimetres using time signals transmitted along a line of sight by radio from satellites. [e]
- Identification friend or foe [r]: Military electronic systems that send a secure "don't kill me" signal to friendly forces, to avoid fratricide, usually based on encrypted interaction with a transponder [e]
- International Maritime Organization [r]: The United Nations agency responsible for avoiding pollution from ships, and implementing the Safety of Life at Sea convention [e]
- Logarithm [r]: Inverse of exponentiation, as subtraction is the inverse of addition and division is the inverse of multiplication. [e]
- MH-53 Pave Low [r]: United States Air Force special operations helicopter that can fly at night, at extremely low altiude, and in most weather. Its main missions are delivering and retrieving special operations personnel. [e]
- MIL-STD-1553 [r]: An extensively used interconnection standard among military electronics components, slow in comparison with local area networks but intended for simple command-response control in electrically noisy environments [e]
- MQ-1 Predator [r]: A medium-altitude, long-endurance, unmanned aerial vehicle used for armed reconnaissance by the Central Intelligence Agency, and for reconnaissance, surveillance and target acquisition at the level of Unified Combatant Commands; it will be replaced by its larger descendant, the MQ-9 Reaper [e]
- Marine navigation [r]: A term including the literal process of navigation, or finding position and course, but of the overall process of safe operation of a water vessel, such as avoiding collisions [e]
- Midcourse [r]: That part of the journey of an unmanned vehicle, or a manned vehicle on autopilot, between launch/takeoff/boost phase and final approach/terminal guidance [e]
- National Geospatial-Intelligence Agency [r]: A United States Department of Defense organization reponsible for interpretation of imagery and geospatial intelligence, as well as geodesic surveys and mapmaking, including missile targeting reference data [e]
- Nautical mile [r]: A unit of distance approximately equal to to one minute of arc of latitude, now defined as being exactly 1852 metres. [e]
- North American Air Defense Command [r]: The joint Canada-U.S. military organization responsible for aerospace threat warning and defense for North America [e]
- Physical map [r]: Map which indicates location of landforms like deserts, mountains and plains, significant bodies of water, with country borders and major cities. [e]
- Red Dwarf (science fiction series) [r]: A science fiction situation comedy originally aired on British television by the BBC in 1988. [e]
- SPS-64 [r]: A Raytheon commercial and military system of navigation radar; while on U.S. Navy ships including the Burke-class and Ticonderoga-class, it is independent of the AEGIS battle management system [e]
- Safety of Life at Sea [r]: International convention defining safety requirements for ships [e]
- Satellite orbits [r]: The path of a celestial body or an artificial satellite as it revolves around another body. [e]
- Search and rescue transponder [r]: A device used by personnel in need of rescue, which assists in the final part of the search by interacting with search radar and guiding the rescuers to the victim [e]
- Self-organizing network [r]: A set of cooperating elements that announce themselves, learn of other nodes of interest, and build interconnections, without the need for central control or manual administration. [e]
- Ship [r]: Vessel larger than a boat for transporting people, goods, or defence by sea, and capable of crossing open waters. [e]
- Traffic Alert and Collision Avoidance System [r]: A self-organizing (i.e., not dependent on central controllers) system of computers and radios, installed in aircraft, which become aware of nearby airplanes and both warn of potential collisions and give each airplane an appropriate evasive maneuver [e]
- Transponder [r]: A device, used in navigation, air traffic control, Safety of Life at Sea, and military operations (e.g., Identification-friend-or-foe which, when interrogated by an appropriate radio or radar signal, replies with its identification and other relevant navigation data [e]
- Warship [r]: A ship designed to employ weapons and sensors in direct naval warfare [e]
- Wristwatch [r]: Timepiece designed to be worn around the wrist. [e]
