And the pilot likely was fatigued, having failed to take advantage of his adequate off-duty hours to get sleep, the NTSB said.

CNN: Pilot texting a factor in deadly copter crash

The European Working Time Directive requires that workers in all occupations have at least 11 hours off duty each day, and limits shifts to 13 hours.

CNN: FAA knew controllers nap, ignored fatigue issue

Several hours later two of us managed to get off duty to go over and see our room.

NPR: Kate Nolan, WWII Combat Nurse

However, only hours after re-opening on 1 April 2008, two off-duty soldiers became trapped in their car after trying to drive across fast-flowing water.

BBC: Call for Stanhope Ford's permanent closure