Which organization formally adopted the 100 km Kármán line standard in 1961?
Answer
Fédération Aéronautique Internationale (FAI)
The formal international standardization of the 100-kilometer boundary was achieved when the Fédération Aéronautique Internationale (FAI), recognized as the global authority for setting aeronautical standards, officially adopted this figure in the year 1961. This adoption cemented the Kármán line as the primary international benchmark for defining the separation between national airspace and outer space. The FAI's definition explicitly ties this altitude to aerodynamic principles, specifically the point where the velocity needed for sustained flight equals the velocity required for orbit.
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