MER (abbreviation of: Multiple Ejektor Rack) is a multi-lock, US-made suspended aerial beam from the Cold War and modern times. The Marvin Engineering Company plants were responsible for its design and production. The MER beam, as a rule, was suspended from the fixed suspension point of the plane (pylon), and the armament was suspended from it. This relatively simple solution meant that on one pylon of a given plane, instead of a single hanging weapon (e.g. a bomb), it was possible to carry six such weapons. During the service, the Mark 20, Mark 82, Mark 82 Snakeye, CBU-87 or CBU-97 bombs were most often hung on the MER beams. During the service, the manufacturer introduced an improved version of the MER beam, marked as BRU-41 (MER), which was characterized by significantly improved reliability, much easier maintenance and has a built-in electronic element controlling the condition of the hanging weapons. It is worth adding that the expansion of the MER beam is the BRU-41 / A Improved Multiple Ejektor Rack (IMER) beam used in the US Navy aviation and the Marine Corps on the F / A-18 A / B / C / D and AV-8B Harier II machines .TER (short for: Triple Ejektor Rack) is a multi-lock, American-made suspended air beam from modern times. The Marvin Engineering Company plants are responsible for its design and production. The TER beam is suspended from the fixed suspension point of the plane (pylon), and the reinforcement is suspended from it. This relatively simple solution means that on one pylon of a given plane, instead of a single hanging weapon (e.g. a bomb), you can carry three such weapons. In the course of service, the manufacturer introduced an improved version of the TER boom, designated as BRU-42 (TER), which was intended primarily for US Navy aircraft. Currently, the latest version of the boom is TER-9 / A Mod, which (according to the manufacturer's data) measures 170.2 cm in length and 38 cm in width. The weight of a single beam is approx. 48 kilograms. The beam has improved reliability, better aerodynamic properties, and is also painted with paints reducing radar reflection. TER type beams (including the latest version) may or may have been used by numerous USAF, US Navy and USMC aircraft, including: F-14 A Tomcat, A-10 Thunderbolt II or F-16 C / D Fighting Falcon. This type of beams could be used to hang various bombs, such as Mark 20 or Mark 80.GBU-12 Paveway is a modern American laser guided aerial bomb. Its first prototypes appeared in the first half of the 1970s, and it was used by the US armed forces in 1976 and remains there to this day. GBU-12 is capable of carrying explosives (Tritonal and PBNX) weighing up to 87 kg with a total empty weight of 230 kg. The GBU-12 Paveway was developed and manufactured by Raytheon and Lockheed Martin, based on the traditional Mk. 82 with a weight of 227 kilograms. Modernization of the Mk. 82 consisted in adding a special head guiding the laser beam and ailerons correcting the fall of the bomb. The first element was originally developed by Texas Instruments, which later became part of Raytheon. GBU-12 requires highlighting with a laser target pointer. Two generations of these bombs appeared in the course of production. He represents the first GBU-12 Paveway I , the second is the GBU-12 Paveway II. The difference - apart from the design of the fins - is primarily that the Paveway II has a homing head that is cheaper to produce and more sensitive, which increases its accuracy and effectiveness. The main carrier of these bombs is the F-111 plane. In addition, it can be carried by, among others: F-15 Strike Eagle, A-10 Thunderbolt II, F-16 Fighting Falcon or F / A-18 Hornet. In the course of Operation Desert Storm in 1990-1991 bombs GBU-12 Paveway showed 88% effectiveness in hitting targets.