Mention the significance of straits and isthmus in international trade.

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Ghissu Editorial · Accepted Answer

Straits and isthmuses are the hinges of world trade, shortening routes, creating ports and carrying energy, but each is a single point of failure. The Strait of Hormuz alone carries about a fifth of the world's daily oil supply.

**Introduction**

A strait is a narrow sea passage joining two water bodies; an isthmus is a narrow land bridge separating two seas, often cut by a canal. These few narrow points shape the cost and security of most seaborne trade.

**Significance of Straits**

1. **Energy chokepoints**: Hormuz carries about a fifth of the world's daily oil supply, and the 2026 Gulf conflict pushed Brent crude to about US$112 a barrel (RIS, 2026).
2. **Shortest sea lanes**: Malacca links the Indian Ocean with the South China Sea and carries much of East Asia's oil, hence China's "Malacca dilemma".
3. **Gateway to enclosed seas**: The Bosporus and Dardanelles carried Ukrainian grain under the 2022 Black Sea Grain Initiative.
4. **Hubs and law**: Straits create hubs such as Singapore, and UNCLOS 1982 guarantees transit passage.

**Significance of Isthmuses and Canals**

SKETCH: flow | When a Chokepoint Closes
- Chokepoint blocked
- Longer detour
- Higher freight, insurance
- Delayed supply chains
- Costlier goods

1. **Suez and Panama**: Suez (1869) cut the Europe-India voyage by thousands of kilometres, and Panama (1914) spares ships the voyage around South America.
2. **Fragility**: The Ever Given blocked Suez in 2021, Panama cut transits in the 2023 drought, and Houthi attacks diverted ships around the Cape of Good Hope.
3. **Way forward**: IMEC, INSTC, Chabahar and the Great Nicobar transshipment port can diversify India's routes, since about 95% of its trade by volume moves by sea.

**Conclusion**

Straits and isthmuses are the hinges of world trade but also single points of failure. Diversified corridors, freedom of navigation under UNCLOS and naval cooperation under SAGAR can keep these lifelines open.

Mention the significance of straits and isthmus in international trade.

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