The dimensions of pilot seats from five different types of civil aircraft were measured and the results compared with existing standards and biomechanical criteria. It was apparent that these seats failed to meet requirements, particularly in the effective depth and inclination of the seat and in the height of the lumbar support and the armrests. Hence, none of these seats made it possible for the pilot to establish a comfortable sitting posture. In comparison with aviation standards, the anthropometric dimensions were not satisfactory, meeting only 4-7 out of 10 requirements. The dimensions based on biomechanics were even less satisfactory, meeting only between 1 and 3 requirements out of 7.