She was built to disappear.

Not in the romantic sense, not like a magician’s flourish or a ship slipping into fog for the sake of poetry, but in the colder, more disciplined sense of Cold War necessity. USS Benjamin Franklin was designed to vanish into the acoustic shadows of the ocean, to become a rumor instead of a presence, a probability instead of a target. That was the deal struck between the Navy and history in the early 1960s. If the submarine could not be found, then war itself might be kept at bay.