Jack Grimm mounted expeditions in the early 1980s to locate the wreck of the Titanic. The ships used in the search towed sonar devices and apparently one of them captured an image that supposedly looked like a ship's propeller. Grimm thought it belonged to the Titanic but this was never confirmed. Is this image available anywhere to the public? I've heard about this apparent propeller sighting for years but I've never seen it anywhere despite many online searches.