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midair collision
A mid-air collision is an aviation accident in which two or more aircraft come into unplanned contact during flight. 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 involved usually results.
The potential for a mid-air collision is increased by miscommunication, mistrust, error in navigation, deviations from flight plans, and the lack of collision-avoidance systems. Although a rare occurrence in general due to the vastness of open space available, collisions often happen near or at airports, where large volumes of aircraft are spaced more closely than in general flight.
==First recorded mid air collision==
The first recorded collision between aircraft occurred at the "Milano Circuito Aereo Internazionale" meeting held between 24 September and 3 October 1910 in Milan, Italy. On 3 October, Frenchman René Thomas, flying an Antoinette IV monoplane, collided with British Army Captain Bertram Dickson by ramming his Farman III biplane in the rear. Both pilots survived, but Dickson was so badly injured that he never flew again.
The first fatal collision occurred in Douai, France, on 19 June 1912. Captain Marcel Dubois and Lieutenant Albert Peignan, both of the French Army, crashed into one another, killing both pilots.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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