The baïne is a geographical phenomenon unique to the Aquitaine coast of France found in the departements of Gironde and Landes. It takes the form of a small pool of water, parallel to the beach, directly connected to the sea. These are spaced every 300 to 400 metres and formed under the influence of waves and the tide. When the tide is receding, they cause a very strong current out to sea. The current will vary depending on the height of the waves and the height of the tide. It is at its strongest and most dangerous, during the final hours approaching low tide and the first hours afterwards.[1]