International commerce spans oceans and continents, but much of it has to squeeze through a handful of narrow maritime passages. These crucial corridors funnel vast volumes of oil, natural gas, and goods, making them some of the most strategically important stretches of water on the planet.

When they're disrupted, the effects ripple fast, spiking energy prices, paralyzing supply chains, and upending global markets.

Click or scroll on to discover the essential straits and canals that keep economies moving.

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The world's most important energy chokepoint, the Strait of Hormuz links the Persian Gulf with the Arabian Sea.

Just 21 miles wide at its narrowest, it channels exports from major producers including Iran, Saudi Arabia, Qatar, the UAE, and Kuwait. Around a fifth of the world's oil passes through it, mostly bound for Asia, along with about 20% of global liquefied natural gas trade. It's also a key route for fertilizers, industrial chemicals, and helium used in sectors from agriculture to semiconductors.

With few viable alternatives, even minor disruption of this strait can reverberate across energy markets and the wider economy.

The Bab el-Mandeb Strait connects the Red Sea to the Gulf of Aden, forming a vital corridor between Europe and Asia via the Suez Canal. Its name translates as the 'Gate of Tears,' a nod to the risks long associated with this often perilous passage. Around 12% of seaborne oil passes through it, alongside roughly 10 to 14% of global maritime trade.

The strait's proximity to conflict zones and piracy hotspots makes it a vulnerable point in global shipping. Any disruption can force vessels to take the much longer route around the Cape of Good Hope in South Africa, driving up costs and delaying deliveries worldwide.

Beyond the Bab el-Mandeb Strait, the 120-mile Suez Canal connects the Red Sea to the Mediterranean, completing the shortest maritime route between Europe and Asia. Running through Egypt since the late 19th century, this artificial waterway carries 12 to 15% of global trade, nearly a tenth of seaborne oil and around 30% of container traffic. Each year, more than $1 trillion-worth of goods flow through it.

When traffic is disrupted, the knock-on effect on supply chains is felt far and wide, exposing just how heavily international commerce depends on this critical canal.

Another landmark feat of engineering, the Panama Canal cuts across Central America, linking the Atlantic and Pacific Oceans and providing a crucial shortcut for global shipping. Opened in 1914 and later expanded, it allows vessels to avoid the long journey around South America.

Today, it carries around 5 to 6% of global maritime trade, including a significant share of US container traffic and energy exports. Risks include the canal's reliance on freshwater. This makes it vulnerable to drought, with reduced water levels limiting transits and creating delays that can upset shipping schedules worldwide.

The Strait of Malacca, between Malaysia, Singapore, and Indonesia, is one of the busiest shipping lanes in the world, linking the Indian Ocean with the South China Sea. It serves as the major maritime corridor between Asia, the Middle East, and Europe, carrying roughly a quarter of global seaborne trade and around 15 million barrels of oil per day.

Less than two miles wide in places, it's a tightly constrained passage with few practical alternatives. As a result, any disruption would have immediate consequences for energy flows and manufacturing supply chains across Asia.

Located between the Indonesian islands of Java and Sumatra, the Sunda Strait links the Indian Ocean with the Java Sea. Its importance lies in its role as an alternative to the Strait of Malacca, offering a secondary route between the Indian and Pacific Oceans when congestion or disruption hits the region's main shipping lane.

About 16 miles wide at its narrowest, the strait is constrained by shallow depths, narrow channels, and navigational hazards, including volcanic eruptions. This limits its capacity, particularly for larger vessels. Even so, it remains a vital fallback corridor.

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The Lombok Strait, between the Indonesian islands of Bali and Lombok, links the Indian Ocean with the Java Sea and forms an important alternative to the Strait of Malacca. While it's only around 11 miles wide at its narrowest, it boasts deeper waters that allow passage for larger vessels, including heavily laden oil tankers and bulk carriers unable to transit the Sunda Strait.

While it carries a smaller share of global trade, the Lombok Strait serves as a go-to Plan B route for shipping in the region.

Comprising the Bosporus and the Dardanelles, the Turkish Straits connect the Black Sea to the Mediterranean via the Sea of Marmara, forming the only maritime outlet for several Black Sea nations. Together they carry around 3% of global seaborne trade, including significant volumes of grain, oil, and industrial goods.

Their importance is amplified by the region's role in global food and energy markets. Navigation can be challenging, especially in the Bosporus, which cuts through Istanbul and narrows to less than 2,300 feet in parts.

The Strait of Gibraltar is the western gateway to the Mediterranean, connecting the Atlantic Ocean with one of the world's busiest maritime basins. Eight miles wide at its narrowest, it sees around 100,000 vessels pass through it each year, accounting for a significant share of global maritime traffic.

The strait is a critical artery for trade between Europe, Africa, and beyond, supporting major cargo and passenger flows, including tens of millions of containers annually.

The Strait of Dover, the narrowest point of the English Channel, is the world's busiest shipping lane, linking the Atlantic with the North Sea. Separating the UK and France, it's around 18 miles wide at its narrowest, yet sees hundreds of vessels pass through it each day alongside heavy cross-channel ferry traffic.

This constant flow through a confined corridor makes it one of the most tightly managed waterways in global shipping. And for good reason, since the heavy traffic and other risks such as strong tides, poor visibility, and strong winds can present serious navigational challenges.

The Danish Straits, comprising the Øresund, Kattegat, and Skagerrak, connect the Baltic Sea with the North Sea, forming the only maritime gateway for several northern European economies. At the narrowest point, the Øresund is just over two miles wide, making this a highly constrained and strategically sensitive passage.

Around 70,000 vessels transit the straits each year, including significant volumes of oil, gas, and bulk cargo, with the route serving as a key outlet for energy exports from Russian ports.

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