Strait
Overview
A strait (해협, strait) is a narrow waterway located between two continents or islands, connecting two larger seas or bodies of water. Straits are critical routes for maritime traffic and strategic military and economic chokepoints, serving as major stages for trade, war, and exploration throughout human history. Notable straits include the Strait of Dover between England and France, the Strait of Gibraltar separating Asia and Africa, and the Korea Strait between the Korean Peninsula and Japan.
Main Content
Geographical Characteristics of Straits
Straits generally range in width from a few hundred meters to several hundred kilometers, and are often shallow, requiring careful navigation. Their formation results from various geological processes such as tectonic movements, sea level changes, and erosion. For example, the Bosphorus Strait was formed about 7,600 years ago when rising sea levels connected the Black Sea and the Mediterranean Sea. Straits often have strong currents and tidal flows, significantly impacting marine ecosystems.
Types of Major Straits
- International Straits: Straits used for international maritime traffic, where the right of free passage is recognized. Examples: Strait of Malacca, Strait of Hormuz.
- Straits within Territorial Seas: Belonging to a specific country's territorial waters, but innocent passage is permitted under international law. Example: Strait of Dover.
- Internal Waters Straits: Considered internal waters of a state, where full sovereignty is exercised. Example: Japan's Seto Inland Sea.
Economic Importance of Straits
Straits are lifelines of global trade. Approximately 60% of the world's maritime trade passes through major straits. The Strait of Malacca is a critical route for about 25% of global oil trade, serving as a gateway for Asia-Europe trade alongside the Suez Canal. Ships passing through straits often pay tolls, providing significant revenue for the bordering countries. Additionally, port cities develop around straits, becoming hubs for logistics and economic activity.
Military and Strategic Importance
Straits are also highly significant militarily. A country that controls a strait can block enemy maritime movement or effectively deploy its navy. During the Cold War, Turkey controlled the Bosphorus Strait to restrict the Soviet Navy's access to the Mediterranean. In modern times, territorial disputes over various straits in the South China Sea have caused international tensions. Straits are also used as strategic points for submarine operations, naval blockades, and amphibious assaults.
International Law Related to Straits
The legal status of straits is governed by the United Nations Convention on the Law of the Sea (UNCLOS). In international straits, the right of transit passage is recognized for all ships and aircraft, and coastal states cannot impede this. In straits within territorial seas, innocent passage is allowed, but submarines must navigate on the surface. Some straits are regulated by special treaties. For example, the Montreux Convention governs passage through the Bosphorus and Dardanelles Straits.
Recent Trends
As of 2024-2025, major trends surrounding straits include the following. First, climate change-induced sea level rise and sea ice reduction are increasing the commercial viability of Arctic straits (Northwest Passage, Northeast Passage). Russia and Canada are in conflict over claims of sovereignty over these straits. Second, a maritime security crisis has escalated in the Bab-el-Mandeb Strait, connecting the Red Sea and the Suez Canal, due to attacks on ships by Yemen's Houthi rebels. Consequently, international shipping companies have chosen to reroute via the Cape of Good Hope, causing a surge in logistics costs. Third, military tensions between China, Taiwan, and the United States over the Taiwan Strait persist, with Chinese military exercises threatening freedom of navigation in the strait. Fourth, piracy in the Strait of Malacca has shown an increasing trend again in 2024, prompting Indonesia, Malaysia, and Singapore to strengthen joint maritime patrols. Fifth, in Europe, a sharp rise in illegal migrant smuggling attempts through the Strait of Dover has deepened diplomatic friction between the UK and France.
Related Topics
- [[Korea Strait]]
- [[Strait of Gibraltar]]
- [[Strait of Malacca]]
- [[Strait of Hormuz]]
- [[Bosphorus Strait]]
- [[International Law of the Sea]]
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