摘要: |
As the year's longest days arrive in the Northern Hemisphere, on either side of the summer solstice, we enter the worst time for standing the back watch. Why? Sleep, or the lack of it, on an unnatural timetable that defies all we know about human physiology, the need for rest, and the negative effects of not getting enough of it. In short, for getting the sleep we need, sun exposure at the wrong time is bad, especially for the back watch. The back watch has historically been from 0000-0600 and 1200-1800 daily - the "wrong time" being prior to going to bed. Traditional six-on six-off watches are brutal schedules for humans, even in a low-stress work environment that isn't safety sensitive and doesn't demand a high level of attention and skill. Operating a tug or towboat? It's none of the above. |