LAHORE: US President Donald Trump's decision to reinstate a naval blockade of Iranian ports and to impose a 20% charge on cargo transiting the Strait of Hormuz has once again thrust the world's maritime chokepoints into the spotlight.

As markets grapple with the fallout from the Hormuz strait, attention is increasingly shifting to other strategic waterways whose disruption could be just as consequential for global trade.

The US-Israeli war on Iran has underscored a reality that is often overlooked until a crisis erupts: the global economy depends on a handful of narrow waterways. Around 80% of global trade by volume and more than 70% by value is transported by sea.

The Strait of Hormuz remains the world's most critical energy artery. Wedged between Iran and Oman, the 39-kilometre-wide passage is the only maritime outlet for the Gulf and carries roughly 20-21 million barrels of oil every day — about one-fifth of global oil supplies. Its effective closure has intensified concerns over energy security and exposed how dependent the world remains on a single gateway.

Yet Hormuz is only the beginning.

Southwest of the Arabian Peninsula lies the Bab al-Mandeb Strait, the only maritime entrance to the Red Sea from the Indian Ocean. As a direct link to the Suez Canal, it handles roughly 12% of global trade. Houthi attacks on commercial shipping have shown how vulnerable this corridor is.

Whenever vessels avoid the Red Sea, they must sail around Africa, adding weeks to voyages and significantly increasing freight costs.

At the northern end of the Red Sea sits the Suez Canal, one of the world's greatest engineering achievements. Since opening in 1869, it has shortened the journey between Asia and Europe by nearly 9,000 kilometers. The six-day blockage caused by the Ever Given in 2021 was a stark reminder that a single incident in this narrow passage can disrupt billions of dollars in global commerce.

Europe's strategic waterways are equally indispensable. The Turkish Straits — the Bosphorus and the Dardanelles — form the only maritime link between the Black Sea and the Mediterranean, making them vital for oil, natural gas and commercial shipping from Eastern Europe and the Black Sea region.

Further west, the Strait of Gibraltar serves as the Mediterranean's only natural gateway to the Atlantic, while the Danish Straits provide the principal exit route for Russian oil exported from Baltic ports to global markets.

If Hormuz dominates today's headlines, the Strait of Malacca may shape tomorrow's geopolitical competition.

Stretching between Malaysia, Singapore and Indonesia, Malacca is the world's busiest oil transit chokepoint, carrying approximately 23 million barrels of oil every day — more than the Strait of Hormuz itself. Nearly 40% of global trade and around 80% of China's imported oil pass through this narrow corridor.

Recent developments have only heightened its strategic significance. Earlier this year, Indonesia briefly floated the idea of charging tolls on vessels transiting the strait, highlighting the leverage geography can provide.

Meanwhile, India's expanding military footprint on Great Nicobar Island and its recent agreement with Indonesia to jointly develop Sabang Port — overlooking the western entrance to the Strait of Malacca — have added a new strategic dimension to the waterway.

As the disruption in the Strait of Hormuz reshapes global energy flows, competition for influence around the Strait of Malacca is likely to intensify.

Further north, the Taiwan Strait has emerged as another critical flashpoint. More than 20% of global maritime trade by value passes through these waters each year, alongside nearly half of the world's container fleet and supply chains carrying advanced semiconductors. Rising military activity across the strait has elevated concerns that any conflict could disrupt not only regional security but also the global technology industry.

Across the Pacific, the Panama Canal remains indispensable to global commerce despite handling a smaller share of world trade.

The 82-kilometer waterway carries about 5% of global maritime trade, 40% of US container traffic, and more than 95% of US liquefied petroleum gas exports destined for Asia. It has also become an increasingly prominent feature of US-China strategic rivalry, with President Trump recently vowing to block any Chinese attempt to control the canal.

When these chokepoints become unstable, shipping companies often have only one alternative: the Cape of Good Hope.

The route around southern Africa adds between 10 and 14 days to voyages between Asia and Europe but has regained importance as vessels seek to avoid disruptions in the Red Sea and the Middle East.

The crisis in Hormuz has exposed more than the vulnerability of a single waterway. It has revealed how the global economy rests on a fragile network of maritime chokepoints connecting continents, energy supplies and supply chains.

From the Persian Gulf to Southeast Asia and from the Mediterranean to the Americas, these narrow passages have become the new frontlines of geopolitical competition. As great-power rivalry deepens, the next global economic shock may not originate in financial markets, but in one of the world's strategic sea lanes.

Articles tagged with "maritime routes"

Beyond Hormuz: 10 maritime chokepoints that could shake the global economy

Beyond Hormuz: 10 maritime chokepoints that could shake the global economy