Fortune-telling is an ancient art that was spread all over the world. Bletonism or Bletonomancy is a name derived from French. This divination technique is based on the interpretation of sea currents. A person with skills related to bletonomancy can read future events.
The technique is also supposed to allow reading human feelings. Bletonomancy can be considered as one of the techniques grouped under the more general term hydromancy.
Bletonism, like many other divination arts, dates back to ancient times.