Port Hercules (Port d'Hercule) is the only deep-water port in Monaco. The port has been in use since ancient times. The modern port was completed in 1926, and underwent substantial improvements in the 1970s. It covers almost 40 acres (160,000 m2), enough to provide anchorage for up to 700 vessels. The port is located in the Condamine district. Harbor pilots are required for all vessels longer than 30 meters. The depth of water in the harbor ranges from seven meters for standard berths and up to 40 meters for the outer piers and cruise ship docks(...) (from Wikipedia).