52 Blue. the loneliest whale isn't a metaphor for me it's a real signal in the SOSUS tapes

Some of you know I lurk here mostly but this one I have to post about because it's REAL and it's documented and it still wrecks me. 1989, US Navy SOSUS arrays — the cold war sub-listening net strung across the north Pacific — pick up a whale call at 52 hertz. Detected again 90 and 91. Problem: blues……