No ship should set sail without a good ship's spirit: The Klabautermann is a goblin who protects the ship. Its name is derived from the former name of the ship's carpenter, the Kalfatermann. Calfing is still the name given to the sealing of the ship's planks today. At night, the Klabautermann He walks around the ship and taps it for rotten and damaged areas. They say: If you hear him knocking, he stays. But if you hear him planing, he will leave. The latter is not good at all, because then the ship is about to sink. However, the invisible troll gives the captain one last warning beforehand: He shows himself to him. Bathers see the Klabautermann usually not.