Port
A port is a maritime facility where ships load and discharge cargo and passengers, and seventy percent of global merchandise trade by value passes through one. That number alone explains why port cities have been shaped by soldiers and immigrants, epidemics and empires, for as long as ships have sailed. Some ancient harbors date back before 3700 BCE. Some medieval Italian port cities produced both Marco Polo and Christopher Columbus. Some once-great English ports now sit miles from the sea. This documentary follows the port from its oldest-known origins through the forces that have made some facilities rise, some vanish, and the ecological pressures now threatening the infrastructure that keeps global trade moving.
Wadi al-Jarf on the Red Sea holds one of the world's oldest known artificial harbors, and excavations there have turned up not only the harbor structures but ancient anchors alongside them. Wherever ancient civilisations engaged in maritime trade, they built the infrastructure to support it.
Lothal, in the Bhal region of the modern Indian state of Gujarat, was a prominent city of the Indus valley civilisation from as early as 3700 BCE. Guangzhou served as a port during Qin dynasty China. Canopus was the principal Egyptian port for Greek trade before Alexandria was founded and replaced it. Athens relied on the port of Piraeus as the base for its fleet, which played a decisive role in the Battle of Salamis against the Persians in 480 BCE.
Rome managed its seaborne commerce through Ostia Antica at the mouth of the Tiber. Claudius built a supplementary facility called Portus; Trajan later enlarged it. Ostia's name derives from the Latin word for mouth. Today the site is noted for the excellent preservation of ancient buildings, frescoes, and mosaics. Its ruins reveal details about Roman urban life that are not accessible within Rome itself.
During Japan's Edo period, the island of Dejima was the only port open for trade with Europe and received a single Dutch ship per year. Osaka was the largest domestic port and the main hub for rice trade. Famous African ports including Mombasa, Zanzibar, Mogadishu, and Kilwa were known to Chinese navigators such as Zheng He and to the medieval Berber traveler Abu Abdullah ibn Battuta.
Rye, in East Sussex, was a significant English port in the Middle Ages. The coastline changed and Rye now sits miles from the sea. The ports of Ravenspurn and Dunwich did not simply become landlocked; they were lost entirely to coastal erosion.
Ostia Antica itself illustrates how a port can outlast its usefulness. Silting and sand invasion eventually pushed the waterline away from the city. The site now lies at a distance from the sea. Sand dunes covering the ruins aided their remarkable preservation, which is why Ostia today yields such detailed evidence about Roman commercial life.
Post-classical Swahili kingdoms built trade port islands and routes connecting to the Islamic world and Asia. Greek historians described these ports as metropolises. Yet many of these sites, too, no longer exist or function as modern ports. Even ports that did not disappear physically could lose their commercial role entirely as trade patterns shifted.
From the 10th century, Italian port cities built fleets for their own protection and to sustain trade networks across the Mediterranean into Asia and Africa. The term for these cities, coined in the 19th century, is the maritime republics. Their coats of arms have appeared on the flags of the Italian Navy and the Italian Merchant Navy since 1947.
The four best-known are Amalfi, Genoa, Pisa, and Venice. Ancona, Gaeta, Noli, and Ragusa in Dalmatia are also counted among them. Amalfi and Gaeta reached their height in the 9th and 10th centuries. After the 11th century both declined sharply while Genoa and Venice became the dominant powers. Pisa flourished in the 13th century before losing its autonomy. Ancona and Ragusa allied to resist Venetian power and each found a golden age in the 15th century. By the 16th century only Venice, Genoa, and Ragusa held autonomy; all three endured moments of splendor through the mid-17th century before slow decline ended with the Napoleonic invasion.
These cities transmitted more than merchandise. New artistic ideas and news about distant countries spread through their networks. They played essential roles in the Crusades. Their most celebrated alumni include Marco Polo and Christopher Columbus, both products of this maritime world.
Port Newark-Elizabeth Marine Terminal in New Jersey was the world's first maritime container seaport and remains one of the largest and busiest. Modern ports are multimodal distribution hubs connecting sea, river, canal, road, rail, and air routes. Gantry cranes, reach stackers, and forklift trucks are standard equipment. Regional distribution centers, warehouses, freight forwarders, canneries, and processing facilities cluster nearby because proximity reduces transport costs.
Deep water ports like Milford Haven are less common than estuary ports but can handle supertankers, Post-Panamax vessels, and large container ships that shallower facilities cannot. Estuary ports need regular dredging to stay navigable. Ships approaching Antwerp, an inland port on the River Scheldt in Belgium, must use Dutch pilots for the section of the estuary that belongs to the Netherlands.
In mainland Europe, public ownership is the norm. The ports of Rotterdam and Amsterdam are owned partly by their national governments and partly by the cities themselves. Liverpool and Southampton both thrived on transatlantic passenger liners until airline travel eliminated that business; both diversified into container cargo and cruise ships. The Port of London was a major international facility on the Thames until the 1950s, when containerization and larger ships pushed traffic downstream. Smart ports use Internet of Things sensors and cloud-based automation to handle goods more efficiently; one industry estimate put global smart port market spending at 1.5 billion dollars in 2019.
The Port of Miami holds the title of world's busiest cruise home port. A cruise home port loads everything from fresh water and fuel to champagne before each voyage and handles the simultaneous boarding and disembarking of thousands of passengers. A port of call is simply a scheduled stop where ships take on supplies or unload cargo.
Cargo ports divide into bulk facilities handling grains, liquid fuels, chemicals, wood, and automobiles, and container ports processing standardized steel boxes. Fishing ports depend on ocean stocks; depletion of fish can make a fishing port economically unviable. Marinas serve recreational boating only.
Warm-water ports, free of ice year-round, carry strategic importance for cold-climate countries. Narvik in Norway, Murmansk, Novorossiysk, Petropavlovsk-Kamchatsky, and Vostochny Port in Russia, Odesa in Ukraine, Dalian in China, Kushiro in Japan, and Valdez at the terminus of the Alaska Pipeline all owe their existence to being ice-free. Russia's historical expansion toward the Black Sea was driven by the access problems Baltic ports faced before icebreakers became available in the 20th century. The St. Lawrence Seaway allows ocean-going ships to travel from the Atlantic several thousand kilometers inland to Great Lakes ports including Toronto, Duluth-Superior, and Chicago.
Every year, 100 million cubic metres of marine sediment are dredged around ports to keep waterways navigable. Dredging disturbs local ecosystems, lifts sediment into the water column, and can release pollutants that settled into the seabed over decades.
An estimated 7,000 invasive species travel in ships' bilge water around the world on any given day. Others attach to hulls. A native species that faced no natural predator can abruptly become prey to an arriving organism. Invasive arrivals also introduce diseases into local marine populations. Sewage from ships and leaks of oil and chemicals add to the water quality degradation that characterises most port-adjacent waterways. Transport corridors around ports concentrate exhaust emissions, with documented health effects on surrounding communities.
Most port infrastructure sits in low-lying coastal zones designed around current sea levels. Coastal flooding, subsidence, and variable weather driven by climate change are already pressing against existing structures. The World Port Sustainability Program, the World Ports Climate Initiative, the African Green Port Initiative, EcoPorts, and Green Marine are among the initiatives working on responses. The port of Tangier Med, which went into service in July 2007 as the largest port in Africa and on the Mediterranean by capacity, is among the facilities now navigating both competitive growth and the need to integrate climate adaptation into long-term planning.
Common questions
What is the oldest known artificial harbor in the world?
Wadi al-Jarf on the Red Sea holds the remains of one of the world's oldest known artificial harbors. Ancient anchors lie scattered among these harbor structures, marking a time when maritime trade began to take shape in human history.
When did the Italian thalassocratic port cities known as maritime republics emerge?
These entities enjoyed political autonomy and economic prosperity driven by their maritime activities starting from the Middle Ages. The term itself was coined during the 19th century but now appears on flags of the Italian Navy since 1947.
Which port became the world's first maritime container seaport?
The Port Newark, Elizabeth Marine Terminal in New Jersey became the world's first maritime container seaport and remains one of the largest and busiest. Commercial seaports include cruise ports and cargo ports, while non-commercial ones encompass marinas and fishing ports.
How many cubic metres of marine sediment are dredged around global ports each year?
Every year 100 million cubic metres of marine sediment are dredged to improve waterways around global ports. This practice disturbs local ecosystems and brings sediments into the water column while stirring up captured pollutants.
When did the port of Shanghai regain its position as the world's busiest container port?
The port of Shanghai regained its position as world's busiest container port in 2010 after leading cargo tonnage since 2009. Singapore ranks second globally in total shipping tonnage and transships a third of all world containers plus half of annual crude oil supply.