The UK Mail Online posted an update on the so-called “Baltic UFO” a few days ago. I’d encourage readers to check it out, as the update includes pictures of sonar scans. The article theorizes that the object may in fact be a secret Nazi undersea submarine defense. If that defense was made of concrete, that may be possible, since the scans make the object look to my eye as rock or a rock formation, hardly a metallic craft of any sort (another shock, I know).