Show HN: Global Maritime Chokepoints

Global Maritime Chokepoints — Interactive Map & Strategic Analysis " type="image/svg+xml"> GLOBAL CHOKEPOINT MAP + − 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. Chokepoint analysis Strait of Hormuz IMPACTED 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. 20% of world oil 21 mi width at narrowest No maritime bypass bypass route Strait of Malacca OPEN 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. 25% of global trade ~94,000 ships/year Lombok bypass route Suez Canal OPEN 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. 12% of global trade ~20,000 ships/year Cape of Good Hope bypass route Bab el-Mandeb OPEN 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. 10-12% of global trade 18 mi width Cape of Good Hope bypass route Panama Canal OPEN 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. 5% of global trade ~14,000 ships/year Drake Passage bypass route Bosphorus CONTROLLED 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. 3% of global oil Turkey controller None bypass route Strait of Gibraltar OPEN 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. ~100,000 ships/year 14km narrowest point None bypass route Cape of Good Hope OPEN 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. +3,200 nmi added distance +12 days added transit Suez / Bab el-Mandeb bypass route Danish Straits OPEN 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. Baltic exit function NATO controlled None bypass route Secondary chokepoints Taiwan Strait SECONDARY 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. ~20% of global trade 110 mi width Korea Strait SECONDARY 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. 120 mi width Energy key cargo Lombok Strait SECONDARY 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. ~3,900 ships/year Deep draft capable Sunda Strait SECONDARY 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. ~2,280 ships/year 15 mi width Florida Straits SECONDARY 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. 93 mi width Oil key cargo Windward Passage SECONDARY 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. 50 mi width Panama route link Strait of Magellan SECONDARY 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. ~1,500 ships/year 350 mi length Cape Horn SECONDARY 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. Panama bypass route Extreme weather risk Northern Sea Route SECONDARY 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. Emerging status Seasonal access