[Drepanocytosis and navigation personnel].

In West and Central Africa one adult in 4 or 5 carries AS trait. This haemoglobin abnormality therefore underlines the question of aptitude of navigation personnel in national or international air-lines. Among these personnel one should separate commercial navigation personnel (CNP) and technical navigation personnel (TNP), if the aptitude in flight of CNP may perhaps be acquired without systematic previous submission to files of Civil Aeronautics Medical Advice, on the other hand a definite and irrefutable decision on the aptitude of TNP can only be envisaged after proving tests for placing the personnel carrying sickle cell trait in the context of airling work.