Taiwan Strait
South China Sea ↔ East China Sea · the corridor roughly half the world's container fleet transits — and the most closely watched maritime flashpoint on the map.
How many ships pass through the Taiwan Strait?
An outsized share of world trade. Roughly half of the global container fleet — and the large majority of the very largest container ships — transit the strait over a year, alongside tankers, LNG carriers and bulk carriers serving China, Japan and South Korea.
Why the Taiwan Strait matters
The Taiwan Strait is the main sea lane linking the South China Sea to the East China Sea, so a huge fraction of the goods feeding North-East Asia's manufacturing economies passes through it — including the semiconductor supply chain that runs out of Taiwan itself. It is also the single most-watched geopolitical maritime flashpoint: any disruption from China–Taiwan tensions would ripple through global shipping and container freight rates within days, and reroutes around it are long and costly.
Geography
The strait separates the island of Taiwan from mainland China's Fujian coast. It is about 180 km wide on average and narrows to roughly 130 km at its tightest point. Unlike a canal chokepoint, it is a broad body of water — but the concentration of high-value traffic makes it function as one of the world's most important maritime corridors.
Sanctions & dark-fleet context
The strait sits on the main route for China's seaborne trade, including sanctioned crude and dark-fleet tankers serving Chinese ports. These vessels frequently disguise beneficial ownership, gap or spoof their AIS, and reflag to obscure their history. Screening a ship transiting the strait against sanctions and PEP lists — with its ownership chain, alias history and AIS-gap record — is the due diligence compliance, bunker and insurance teams rely on before transacting.
Frequently asked questions
How many ships pass through the Taiwan Strait?
Roughly half of the global container fleet, and the large majority of the largest container ships, transit over the course of a year — plus tankers, LNG and bulk carriers moving between North-East Asia and the rest of the world.
Why is the Taiwan Strait so important?
It is the main lane linking the South China Sea to the East China Sea and carries a huge share of the goods feeding North-East Asia, including the semiconductor supply chain. It is also the most-watched geopolitical maritime flashpoint — disruption would hit global shipping and freight rates within days.
How wide is the Taiwan Strait?
About 180 km wide on average, narrowing to roughly 130 km at its tightest point between Fujian and Taiwan.
Is the Taiwan Strait international waters?
Most of the strait lies beyond any 12-nautical-mile territorial sea, so a central corridor is high seas / EEZ that most maritime states treat as international waters open to freedom of navigation. Beijing disputes this. Commercial traffic transits it continuously regardless.
Why does it matter for sanctions monitoring?
It sits on the main route for China's seaborne trade, including sanctioned crude and dark-fleet tankers that disguise ownership and gap their AIS. Screening any vessel that transits it against 50+ sanctions lists — with ownership chain and AIS-gap history — is exactly the compliance check the trade needs.
Live chokepoint trackers
Strait Up Maritime runs live vessel maps with a sanctioned-vessel overlay for these chokepoints — every ship transiting, updated every 60 seconds, no login required.