Also the area appears on maps and in sailing logs as a bay of refuge for the Manila Galleon trade as well as for other coastal seafarers. As such it figures in some accounts of pirate operations and smuggling and pirate contravention efforts by the viceregal government. During the 17th and 18th centuries the Banderas Valley and its beaches along the Bay of Banderas served as supply points for ships seeking refuge in the bay. The area also served as a point where smuggled goods could be sent on to the Sierra towns near Mascota, evading the customs operations at San Blas, Nayarit.