Freedom of the High Seas
The principle that the high seas are open to all states for navigation, fishing, and other lawful uses.
Updated April 23, 2026
How It Works in Practice
The principle of Freedom of the High Seas means that the vast ocean areas beyond any country's territorial waters are open to all states. No state can claim sovereignty over these waters, allowing ships from any nation to navigate freely, fish, lay submarine cables, or conduct scientific research, provided they comply with international laws. This principle is essential for global trade and communication since most international shipping routes cross these open waters.
Why It Matters
Freedom of the High Seas is a cornerstone of international maritime law, ensuring peaceful use and cooperation on the world's oceans. It prevents conflicts over maritime claims by clearly designating areas where no single state has exclusive rights. This freedom supports global commerce, fishing industries, and the laying of telecommunications cables, which are vital to the world economy and connectivity.
Freedom of the High Seas vs Territorial Waters
While the high seas are open to all, territorial waters extend up to 12 nautical miles from a country's coastline and fall under that country's sovereignty. Within territorial waters, the coastal state has exclusive rights and jurisdiction. Beyond this zone, the high seas are international waters where Freedom of the High Seas applies, allowing passage and activities by all states.
Real-World Examples
The Suez Canal and the Strait of Gibraltar are critical maritime passages connecting different seas, where the principle of Freedom of the High Seas ensures ships from all nations can transit without obstruction. Another example is deep-sea fishing beyond national jurisdictions, which depends on this freedom but increasingly requires international cooperation to prevent overfishing.
Common Misconceptions
A common misconception is that the high seas are lawless and unregulated. In reality, international agreements, such as the United Nations Convention on the Law of the Sea (UNCLOS), establish rules governing activities on the high seas to protect marine environments and ensure safety. Another misunderstanding is that Freedom of the High Seas allows harmful activities; however, states must exercise their freedoms with due regard for the interests of others and international regulations.
Example
The principle of Freedom of the High Seas ensured that merchant vessels from multiple countries could pass through the open ocean during peacetime without interference from coastal states.