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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 ...
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.
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 the ...
Terrain awareness and warning system. In aviation, a terrain awareness and warning system (TAWS) is generally an on-board system aimed at preventing unintentional impacts with the ground, termed "controlled flight into terrain" accidents, or CFIT. [1] The specific systems currently in use are the ground proximity warning system (GPWS) and the ...
Hierarchy of hazard control is a system used in industry to prioritize possible interventions to minimize or eliminate exposure to hazards. [a] It is a widely accepted system promoted by numerous safety organizations. This concept is taught to managers in industry, to be promoted as standard practice in the workplace.
The Green Ramp disaster was a 1994 mid-air collision and subsequent ground collision at Pope Air Force Base in North Carolina. It killed twenty-four members of the U.S. Army 's 82nd Airborne Division preparing for an airborne training operation. [1][2][3] As of 2024, this incident has the largest number of ground fatalities for an accidental ...
The vortex ring state (VRS) is a dangerous aerodynamic condition that may arise in helicopter flight, when a vortex ring system engulfs the rotor, causing severe loss of lift. Often the term settling with power is used as a synonym, e.g., in Australia, the UK, and the US, [2][3][4] but not in Canada, which uses the latter term for a different ...
A United States Navy Sikorsky HH-60H Seahawk crashed into the Pacific Ocean 16 miles (26 km) SW of San Diego, California. The aircraft was on a routine training flight and returning to the aircraft carrier USS Nimitz when the accident occurred off of Point Loma, California, killing all 5 members of its crew.