Tarifa is the name of a port to the South of Spain. It lies approximately 13 kilometres from the African continent. In the Mediterranean Sea. In the Strait of Gibraltar. Legend has it that Hercules separated the Mainland African European. Fee named Arab general Tarik, first Muslim to invadio Spain in 711. Reportedly, vessels should pay a sum to cross the Strait of Gibraltar precisely in Tarifa. Surely they said "Preparing payment for fee ( port ) " and are there was as a synonym for payment, rate, amount.