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The anti-personnel obstacle breaching system (APOBS) is an explosive line charge system that allows safe breaching through complex antipersonnel obstacles, particularly fields of land mines. The APOBS is a joint DOD program for the U.S. Army and the United States Marine Corps .
The effectiveness of any wire obstacle is greatly increased by planting anti-tank and blast antipersonnel mines in and around it. Additionally, connecting bounding anti-personnel mines (e.g. the PROM-1) to the obstacle with tripwires has the effect of booby-trapping the obstacle itself, hindering attempts to clear it.
Systems in current use include the British Python minefield breaching system, which can clear a 7.3-metre (24 ft) wide by 180–200-metre (590–660 ft) long path, and the American M58 Mine Clearing Line Charge, which can clear an 8 m wide by 100 m long path. [8] Both are large, heavy systems that are deployed in a vehicle-towed trailer.
The Obstacle Collision Avoidance System (OCAS) is designed to alert pilots if their aircraft is in immediate danger of flying into an obstacle. OCAS uses a low power ground-based radar to provide detection and tracking of an aircraft's proximity to an obstacle such as high buildings , power line crossings, telecom towers or wind turbines .
The device is usually composed of a fork or two push arm assemblies fitted to the front of a tank hull, with two banks of rollers that can be lowered in front of the tank's tracks. Each roller bank has several heavy wheels studded with short projecting steel girders, which apply a higher ground pressure than the tank's tracks. This ensures the ...
The Python minefield breaching system is used by the British Army to clear minefields. It replaces the Giant Viper, and has the ability to clear a safe lane in minefields 180–200 m long and 7.3 m wide through which vehicles can pass. A Chieftain AVRE carrying fascines and towing Python on Salisbury Plain.
Detailed view of a Beacon light on a Tu-154. Beacon lights are flashing red lights fitted on the top and bottom fuselage of an aircraft usually on larger passenger aircraft. Their purpose is to alert ground crew and other aircraft that an engine is starting up, running or shutting down, or that the aircraft is about to start moving.
Aviation obstruction lighting is used to enhance the visibility of structures or fixed obstacles which may conflict with the safe navigation of aircraft. Obstruction lighting is commonly installed on towers, buildings, and even fences located in areas where aircraft may be operating at low altitudes.