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  2. Runway incursion - Wikipedia

    en.wikipedia.org/wiki/Runway_incursion

    A runway incursion is an aviation incident involving improper positioning of vehicles or people on any airport runway or its protected area. When an incursion involves an active runway being used by arriving or departing aircraft, the potential for a collision hazard or Instrument Landing System (ILS) interference can exist.

  3. Collision avoidance system - Wikipedia

    en.wikipedia.org/wiki/Collision_avoidance_system

    A collision avoidance system ( CAS ), also known as a pre-crash system, forward collision warning system ( FCW ), or collision mitigation system, is an advanced driver-assistance system designed to prevent or reduce the severity of a collision. [2] In its basic form, a forward collision warning system monitors a vehicle's speed, the speed of ...

  4. Traffic collision avoidance system - Wikipedia

    en.wikipedia.org/wiki/Traffic_collision...

    A traffic alert and collision avoidance system ( TCAS, pronounced / tiːkæs /; TEE-kas ), is an aircraft collision avoidance system designed to reduce the incidence of mid-air collision (MAC) between aircraft. It monitors the airspace around an aircraft for other aircraft equipped with a corresponding active transponder, independent of air ...

  5. Mid-air collision - Wikipedia

    en.wikipedia.org/wiki/Mid-air_collision

    Mid-air collision. In aviation, a mid-air collision is an accident in which two or more aircraft come into unplanned contact during flight. [1] Owing to the relatively high velocities involved and the likelihood of subsequent impact with the ground or sea, very severe damage or the total destruction of at least one of the aircraft usually results.

  6. Airborne collision avoidance system - Wikipedia

    en.wikipedia.org/wiki/Airborne_collision...

    An airborne collision avoidance system ( ACAS, usually pronounced as ay-kas) operates independently of ground-based equipment and air traffic control in warning pilots of the presence of other aircraft that may present a threat of collision. If the risk of collision is imminent, the system recommends a maneuver that will reduce the risk of ...

  7. Traffic collision - Wikipedia

    en.wikipedia.org/wiki/Traffic_collision

    Traffic collision. A traffic collision, also known as a motor vehicle collision, or car crash, occurs when a vehicle collides with another vehicle, pedestrian, animal, road debris, or other moving or stationary obstruction, such as a tree, pole or building. Traffic collisions often result in injury, disability, death, and property damage as ...

  8. Portable collision avoidance system - Wikipedia

    en.wikipedia.org/wiki/Portable_collision...

    A portable collision avoidance system (PCAS) is an aircraft collision avoidance system similar in function to traffic collision avoidance system (TCAS). TCAS is the industry standard for commercial collision avoidance systems but PCAS is gaining recognition as an effective means of collision avoidance for general aviation and is in use the world over by independent pilots in personally owned ...

  9. CBRN defense - Wikipedia

    en.wikipedia.org/wiki/CBRN_defense

    Training in the defense against CBRN agents as part of combat support is the main aim of exercise 'Grifo' (Griffin) – the most important of this type that the Army undertakes. The National Police and the Spanish Civil Guard have their own CBRN units. The Military Emergencies Unit and emergency services have CBRN training. Sweden