I say " allegedly" because the studies are not publicly available, but they claim they were used on fighter pilots who would often make avoidable mistakes as a result of stress and ultimately sleeplessness.
And so, the loss of the El Faro in these very extreme weather conditions was contributed to by her design and also by her age, but it was an avoidable error.
U.S., U.N., European and African officials are scrambling now to try to prevent what Perriello calls an avoidable crisis and reach a negotiated solution soon.