Sonar anomaly off NC investigated. Could be shipwreck, rock formation — ‘or otherwise’ Prison Planet.com Posted on June 28, 2018 Posted in Aggregated No Comments Tagged with Sci Tech Charlotte Observer | A strange “sonar anomaly” had NOAA explorers diving off the coast of North Carolina on Wednesday, hoping for an explanation. Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email