Dreams and visions will poison your sailors’ minds, and your ship will be plagued with murder, suicide and senseless mutiny. A bay that beckons you to safe harbour may seethe with savage sea serpents before the night is over. Water-maidens come to the top of the waves, to beckon with bare breasts and sweet voices, but the sailor that plunges in for that pleasure is dragged under to be food for their sharp-toothed mates hiding below the water.