01What a chokepoint is
A maritime chokepoint is a strait or canal through which a large volume of shipping must pass, because the alternatives are much longer or impossible for large ships. Chokepoints are efficient in normal times and fragile in bad times: a single accident, conflict, drought or political decision can close or restrict them, and there is no quick way to add capacity.
The US Energy Information Administration tracks chokepoints for oil flows, and the IMF's PortWatch platform tracks daily ship transits through the main passages using satellite AIS data. Our live chokepoints page shows current traffic through each compared with its recent norm.
02The chokepoints that matter for European and Asian trade
| Chokepoint | Connects | What passes | Main alternative |
|---|---|---|---|
| Suez Canal | Mediterranean and Red Sea | Most container trade between Asia and Europe, oil and LNG | Cape of Good Hope, adding roughly 3,500 nautical miles Asia–Northern Europe |
| Bab el-Mandeb | Red Sea and Gulf of Aden | Everything that uses Suez | Same as Suez |
| Strait of Hormuz | Persian Gulf and Arabian Sea | About a fifth of world oil consumption, a large share of LNG exports (Qatar) | Limited pipelines in Saudi Arabia and the UAE; no route for LNG |
| Strait of Malacca | Indian Ocean and South China Sea | The largest oil flow of any chokepoint according to the EIA, and a large share of Asia's container trade | Lombok and Sunda straits, longer |
| Panama Canal | Atlantic and Pacific | US East Coast–Asia trade, LPG, grain | US rail land bridge, Suez, Strait of Magellan |
| Turkish Straits (Bosporus) | Black Sea and Mediterranean | Grain, oil and metals from Black Sea ports | None by sea |
03Three recent disruptions and what they did
Suez Canal, March 2021: the Ever Given
On 23 March 2021 the container ship Ever Given ran aground and blocked the Suez Canal for six days. Hundreds of ships queued at both ends. The blockage itself was short, but its effect on schedules lasted for weeks: ships arrived late and in bunches at European ports, terminals congested, and empty containers were stuck in the wrong places at a time when freight rates were already at record levels because of the pandemic.
Red Sea, from late 2023: the diversion around Africa
From November 2023, attacks on merchant ships in the southern Red Sea led most major container lines to stop using the Suez route and sail around the Cape of Good Hope. Transits through Suez fell sharply through 2024 according to PortWatch data. The longer voyages absorbed a large share of the world container fleet's capacity, so spot freight rates rose not only on Asia–Europe lanes but on routes that never touched the Red Sea.
Panama Canal, 2023–2024: drought
The Panama Canal's locks are fed by fresh water from Gatun Lake. A severe drought in 2023, linked to El Niño, lowered the lake so much that the canal authority cut the number of daily transits and restricted ship draughts for months. Shippers paid for priority slots, waited, or rerouted through Suez or across the US by rail. It was a reminder that chokepoints can fail for climate reasons as well as political ones.
04How a closure reaches your company
For a manufacturer the effect of a chokepoint closure comes in three waves:
- Freight cost. Spot rates react within days. Contract rates follow at the next renewal, often with emergency surcharges in between. In the EU, higher freight also raises the customs value and so the duty.
- Lead time and reliability. Voyages get longer and schedules less reliable. Ships arrive late or skip ports. The variability of the lead time grows more than its average.
- Inventory and cash. To keep the same service level with longer and more variable lead times, you need more safety stock, and more goods are paid for and still at sea. Both tie up cash.
There are also indirect effects. Your European suppliers may depend on Asian components crossing the same route, so their deliveries slip too. Energy and commodity prices react when oil or LNG routes are involved, which feeds into the prices of many inputs.
05Estimate your exposure
Work through your critical inputs, one route at a time:
| Question | How to answer it |
|---|---|
| Which chokepoints does each shipment cross? | Origin port, destination port and the usual service; ask your forwarder |
| What share of the input's volume uses that route? | Purchase records by supplier and Incoterm |
| What is the alternative route and its extra time? | Forwarder quotes; for Suez, add the Cape of Good Hope transit |
| How much stock do you hold today in days of cover? | Inventory reports |
| How quickly can you switch to another supplier or mode? | Qualification time, air freight cost |
The inputs most at risk are those with high volume through a single chokepoint, low days of cover and no qualified alternative supplier on another route.
06Responses, from cheapest to most expensive
- Watch the signals. Transit counts, freight indices and insurers' war-risk listings move before your supplier tells you about delays.
- Rebalance stock early. Ordering a few weeks of extra cover when risk rises is cheaper than air freight after a closure.
- Change Incoterms. Buying on delivered terms shifts freight risk to the supplier, usually at a premium.
- Book alternative capacity. Rail from China to Europe, short-sea or road from nearer suppliers, or a forwarder contract with routing flexibility.
- Dual-source from another region. The structural fix for critical inputs. See our guide to single-supplier risk.
FAQFrequently asked questions
What are the world's main shipping chokepoints?
The Strait of Malacca, the Strait of Hormuz, the Suez Canal and Bab el-Mandeb, the Panama Canal, the Turkish Straits and the Strait of Gibraltar are the most important for global trade.
How long does rerouting around the Cape of Good Hope add?
For services between Asia and Northern Europe, typically about 10 to 14 days per voyage compared with the Suez route, depending on ship speed and ports of call.
How does a Suez Canal closure affect European companies?
It raises container freight rates, lengthens lead times from Asia by one to two weeks, makes schedules less reliable and increases the stock and cash needed to maintain service levels.
What share of world oil passes through the Strait of Hormuz?
According to the US Energy Information Administration, oil flows through Hormuz correspond to about a fifth of global petroleum liquids consumption. Qatar's LNG exports also pass through it.
How can I track chokepoint disruptions?
Public sources include the IMF PortWatch platform, which reports daily transits based on AIS data, and freight rate indices. The Simdots chokepoints page summarises current traffic against its recent norm.