Queen Mertyl is a cruise ship.
The 13 Ghosts of Scooby Doo
Daphne Blake, Shaggy Rogers, Scooby-Doo, Scrappy-Doo, and Flim-Flam boarded the ship to take a short vacation in order to calm Scooby's nerves. Later, Bogel and Weerd appeared and began to torment Scooby. The rest of the gang never saw the ghosts, and figured Scooby was acting up due to his nerves. After a few incidents with Bogel and Weerd, Vincent Van Ghoul used his crystal ball to notify the gang that there were ghosts on the ship. Daphne, Scrappy, and Flim-Flam decided to investigate. While investigating, they found the captain, who invited them to dinner in the dining room.
Daphne, Scrappy, and Flim-Flam went back to their cabin to tell Scooby and Shaggy, and the gang proceeded to the dining room. There, the captain announced that they were traveling on a ghost ship, and it was the ship's fiftieth anniversary of sinking. Upon realizing the captain and passengers were ghosts, the gang hid in their cabin. Vincent notified the gang through the crystal ball that the ship was on course for the Bermuda Triangle, and that the Chest of Demons would open and release the demons inside. The gang headed to the control room, where they successfully managed to reroute the ship. However, the ship reached the tip of the Bermuda Triangle and the Chest of Demons still opened, unleashing a demon cyclops with a tornado-like body. The cyclops swallowed the ghost captain and passengers using the tornado-like part of its body, and chased the gang into the ship's movie theater. There, Scooby tricked the demon back into the Chest of Demons. The ship disappeared, as the ghosts were now all defeated, and Scooby used a raft he had been keeping in his fur to get the gang back to shore.