"it had an eclectic résumé that included, in 1966, helping to recover a 70-kiloton hydrogen bomb that was dropped when two military planes collided over the Spanish coast."
That doesn't sound right. 70 kilotons would be very small for a hydrogen bomb. Indeed, one Wikipedia article says it was a 1.4 megaton bomb, twenty times the number the Wired article:
https://en.wikipedia.org/wiki/DSV_Alvin#:~:text=On%2017%20Ma....
And this other wikipedia article says: "The Y1 nomenclature indicates a W28 warhead with a yield of 1.1 megatonnes of TNT"