[via There, I Fixed It]
In the Navy, this is your bed. It's about 2 by 2 by 6, and the mattress is about 2 inches thick.
You get used to it.
Outside of Mr. 6'11, tall guys usually just learned to sleep on their sides with their knees up.
On the bright side, even enlisted guys' bunks have the "flimsy blue curtain of pseudo-privacy."