[Study of the flight work capacity of pilots during simulated motion sickness].

With the aid of a modified procedure of reading instrumental indications of an aircraft the professional performance of pilots was studied during simulated motion sickness. A ball system was developed to assess the results of reading the instrumental indications. After five exposures to double rotation statokinetically stable pilots developed a latent form and statokinetically unstable pilots developed an overt form of motion sickness. The latent form of motion sickness manifested itself in deteriorated professional performance. The overt form of motion sickness was preceded by a decline of professional performance.