Pirates were interesting, that was a fact. Although Ariadne had read many history books, she never came across one on pirates, so her knowledge of the subject was limited, which made this class even more interesting. After studying the flags closely, she raised her hand to venture a guess.

'All of them involve a representation of the Muggle sign for danger, which makes them like a warning for other sailors who approach pirate ships.' the Gryffindor said.