Fatigue... The silent enemy

Much emphasis has been doing in recent times on fatigue and its impact on safety, however I can say, unequivocally, that efforts to improve this latent condition in our operations has not been sufficient.

ICAO is finalizing details of its FMRs (Fatigue Risk Management System) whose implementation will be held by the signatory states, but I think the biggest responsibility for managing fatigue lies in each of us, operating personnel, and we must be aware of the real danger that this silent enemy is.

Before going further, let's remember what is fatigue, "Fatigue is a condition characterized by a growing discomfort with reduced capacity to work, reduced efficiency in meeting targets, loss of ability to respond to stimuli, and usually this accompanied by the sensation of tiredness and exhaustion. "

If we dig a little more on this definition we can conclude that fatigue directly affects our level of consciousness, and this reduction may mean that this person must be unable to maintain the level of surveillance necessary for air operations.

A moderate fatigue can mean a lower level of consciousness to Grade IV, in which the individual entered the stage of dreaming and, as a result of this, would be affected by an attenuation of the perceptual process. In this case some of the observed behaviors are: numbness, maladaptive attitudes, poor coordination and disorientation. Additionally alpha brain waves, which allow surveillance, will slow down and will be replaced by beta waves, that are present during sleep.

This condition can lead to a mismatch between the individual and their environment, and may generate a loss of situational awareness that could lead to an accident or incident, and therein lies the importance of effectively managing fatigue and mitigate the effects this may have on our operations.

The first step is usually given by regulations of each state, which should be the first line of defense against this danger. Secondly there must be crew scheduling policies adapted to the operational realities of each operator, and finally, on third place effective management of fatigue by the operational staff (pilots, cabin crew, mechanics, flight dispatchers, air traffic controllers) which must comply with statutory rest periods and improve their personal habits to afford adequate time and quality rest.

By changing our operational culture and paying attention to those conditions that could be causing increased workload, loss of rest quality, and significant changes in our circadian cycles, we can keep this silent enemy away from our operations and reduce the level of its threat.

Happy Flights!

PS: Here a publication of the FAA about this danger http://www.faa.gov/pilots/safety/pilotsafetybrochures/media/Fatigue_Aviation.pdf