Roughly 300 vessels pass the Strait of Gibraltar daily. It is as if there's an imaginary border between lands where it is possible to buy and sell anything. As these waters are in the way of everybody, there are some specific rules over hich the maritime guards do their best. However, only the best ones resist. And the photographer, Oliva F. Reina, on board of a boat less than eight meter-long has sailed round these vessels knowing their secrets and keeping them with her camera. The images that she took, over the years, are the heritage that we are now contemplating.