The Maritime Safety and Rescue Society released a map detailing the areas of concern so that sailors may avoid them. The areas run between the Gulf of Cadiz and the Strait of Gibraltar.

According to an “investigation order” revealed by the Federal Maritime Commission (FMC) in the US Federal Register, the Strait of Gibraltar is one of the busiest shipping corridors in the world.

A little over 5 million years ago, water from the Atlantic Ocean found a way through the present-day Strait of Gibraltar. According to this theory, oceanic water rushed faster than a speeding car down ...