Some local fishermen in the area where the Titanic sank have also told stories over the years. They talk about seeing strange lights or figures on the water, especially on nights when the sea is calm. While these stories might not be formally documented in a scientific sense, they contribute to the body of Titanic ghost stories.
There are also some reports from divers and researchers who visited the wreck site. They sometimes describe unusual experiences that they can't easily explain, like seeing a figure that looks like a person from the Titanic era, but there's no one else around. However, these are more in the realm of anecdotes rather than strictly scientific 'documented' evidence as we would expect in a scientific study.