USS Lexington is an Essex-class aircraft carrier built during World War II and saw extensive service through the Pacific War. She then became a training carrier until being decommissioned in 1991. She is now a museum and a National Historic Landmark. During her service she was nicknamed "The Blue Ghost".

Visitors to the ship have reported seeing the apparition of a young sailor aged about 20 years old in the engine room. It has been claimed that the ghost has even conversed with some guests, who have believed him to be a guide.

Some believe the ghost to be one of the sailors killed during the time in which the ship saw service in WW2.

Pictured left is the USS Lexington courtesy of Liveon001.