To sink in battle... not in that flash... is what I yearned for...In 1946, after the war, Nagato was taken over by the United States for Operation Crossroads...
That is, she was a target for atomic bomb tests.
In the first test, the dropped bomb missed its mark and Nagato was 1.5 km away from the explosion's source, receiving only superficial damage.
In the second test, a hole was drilled in the bow of a ship, where the bomb was loaded and rigged for explosion. Despite being only 900m from "ground zero", Nagato is said to have endured the blast well, only listing by a mere 5 degrees.
But four days later, Nagato slipped beneath the waves in the darkness of the night.
Avoiding the fate of being scrapped, the Big Seven sleeps at the bottom of Bikini Atoll.
(from Nico Nico Pedia)