not decoration, and it is not about helping you nap. It is a deliberate safety measure, timed to the exact minutes of flight when something is statistically most likely to go wrong.
Takeoff and landing are when aviation accidents cluster. Industry safety reviews have long described the period from the start of the takeoff roll to a few minutes after, and the final descent through touchdown, as the “critical phases” of flight. The aircraft is low, slow, heavy with fuel, and close to the ground. Crews prepare for these windows
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