The USS Constellation in Baltimore is described as a haunted ship due to stories of spectral figures and unexplained phenomena. Reports include sightings of deceased crew members and a prisoner who witnessed ghostly shipmates dancing. Other accounts feature a man killed by a top sail mast accident, with his blood said to have splattered the deck, and unexplained instances of banging pots and pans, despite them being stored off the ship. Specters have been seen walking on the deck and in the windows. Stories describe a gruesome accident where a man was crushed by the top sail mast. Visitors have reported hearing banging pots and pans, even when they are stored elsewhere on the ship. A prisoner reported seeing two shipmates dancing and wanting him to sing. Pots and pans have been seen stacked and defying gravity outside a prison cell. Reports of paranormal activity on the ship began surfacing in the 1960s and 1970s. Some stories are based on primary sources, like a 1862-65 diary by a ship's yeoman, Moses Safford, and descriptions from the ship's historical records.