Primary
Primary Chokepoint
No cost-effective alternative
Straits and canals where closure forces massive detours or cuts off access to entire seas and resource regions. These are the highest-consequence bottlenecks in global trade.
Secondary
Secondary Chokepoint
Alternatives exist
Passages that have bypass routes, but disruption would still cause notable detours, added shipping costs, and supply chain delays across affected regions.
There are roughly 200 straits worldwide, but only a handful function as true chokepoints — narrow passages where geography concentrates shipping into corridors that cannot be easily bypassed. This page covers 18 of the most strategically significant. They matter because the global economy runs on maritime trade: over 80% of world goods move by sea, and disruption at any one of these bottlenecks can ripple across energy markets, supply chains, and food security within days.
Persian Gulf · Iran / Oman
The world's most critical energy chokepoint — with no maritime bypass route. Iran sits along its entire northern coast, giving it the ability to threaten closure with mines, missiles, and fast attack boats. Limited pipeline alternatives exist but cannot replace the ~20 million barrels/day that transit by sea.
No maritime bypass
bypass route
Southeast Asia · Malaysia / Indonesia / Singapore
The busiest chokepoint by ship count and China, Japan, and South Korea's primary oil lifeline from the Middle East. A blockage here would rival Hormuz in economic impact. Piracy has historically been a concern; Singapore manages heavy traffic coordination through one of the narrowest shipping lanes in the world.
Egypt · Mediterranean / Red Sea
Man-made canal connecting Mediterranean to Red Sea. Carries ~12% of global trade and ~10% of oil. The Ever Given blockage (2021) cost an estimated $9.6B/day. When Bab el-Mandeb is blocked, the Suez route becomes useless — ships must reroute around Africa regardless.
Cape of Good Hope
bypass route
Red Sea Gateway · Yemen / Djibouti / Eritrea
The southern gateway to the Suez Canal. All shipping between Asia and Europe via Suez must pass through this 18-mile-wide strait. Its proximity to Yemen makes it vulnerable to non-state actors and regional instability. When blocked, ships must reroute around the entire African continent.
Cape of Good Hope
bypass route
Central America · Atlantic / Pacific
The primary Atlantic-Pacific shortcut, carrying ~5% of global trade. Relies on freshwater from Gatun Lake to operate its lock system, making it uniquely vulnerable to drought. A severe drought in 2023-24 forced Panama to reduce daily transits by ~40% — a climate-driven chokepoint disruption.
Drake Passage
bypass route
Turkey · Black Sea / Mediterranean
Turkey controls both the Bosphorus and Dardanelles under the 1936 Montreux Convention, giving it legal authority to restrict warship passage in wartime. This single-nation control over a major waterway makes Turkey a pivotal gatekeeper between the Black Sea and the Mediterranean.
Atlantic / Mediterranean · Spain / Morocco
The only maritime gateway between the Atlantic and the Mediterranean. All shipping to or from Mediterranean ports must pass through here. Gibraltar, on the northern shore, is a British Overseas Territory. One of the busiest waterways on Earth with low disruption risk but enormous strategic significance.
South Africa · Atlantic / Indian Ocean
The primary alternative for vessels bypassing the Suez Canal or Bab el-Mandeb Strait. While it avoids high-risk areas like the Red Sea, it adds approximately 3,200 nautical miles and 10-14 days to a standard Asia-Europe journey.
Suez / Bab el-Mandeb
bypass route
Baltic Sea outlet · Denmark / Sweden
The only maritime exit for Baltic Sea nations — Russia, Finland, Sweden, Poland, Germany, Estonia, Latvia, Lithuania. Russian oil and gas exports and Nordic trade all depend on these straits. NATO membership of Denmark and Sweden makes these straits geopolitically significant in any European security scenario.
East Asia · Taiwan / China
A 110-mile-wide passage carrying roughly 20% of global maritime trade by value, including critical semiconductor supply chains. One of the most geopolitically sensitive waterways in the world.
East Asia · South Korea / Japan
Links the East China Sea to the Sea of Japan. Vital for Japanese and South Korean trade, particularly energy imports. Tsushima Island divides the strait into two channels.
Southeast Asia · Bali / Lombok, Indonesia
The primary bypass for the Strait of Malacca. Deep enough for supertankers and VLCCs that cannot transit Malacca's shallow Phillips Channel. About 3,900 ships transit annually.
Southeast Asia · Java / Sumatra, Indonesia
Another Malacca alternative connecting the Java Sea to the Indian Ocean. Narrower and shallower than Lombok, limiting it to smaller vessels. About 2,280 ships transit annually.
Caribbean · Florida / Cuba / Bahamas
Connects the Gulf of Mexico to the Atlantic Ocean. Carries significant oil tanker traffic from Gulf Coast refineries and serves as a primary shipping corridor for U.S. energy exports.
Caribbean · Cuba / Haiti
A 50-mile-wide channel between Cuba and Hispaniola. Important shortcut between the U.S. East Coast and the Panama Canal, reducing transit time compared to routing through the Florida Straits.
South America · Chile / Argentina
A navigable Atlantic-Pacific route at South America's tip. Calmer than the Drake Passage but narrow with tricky currents. About 1,500 ships transit annually, mainly as a Panama Canal alternative.
South America · Chile
The traditional bypass for the Panama Canal, used by vessels that cannot fit through the canal's locks or when drought-induced water shortages limit canal capacity. Known for extreme weather and powerful currents.
Arctic · Russia's Northern Coast
An emerging bypass route across Russia's northern coast connecting Europe and Asia. Melting Arctic ice is making it more viable, potentially offering a shorter path that avoids Suez Canal taxes. Remains unpredictable due to sea ice.