A more thorough explanation:

Transit passage is a term used in international law to describe the right of a vessel or airplane to travel freely through a specific area for the purpose of continuous and efficient transit between two parts of the high seas or an exclusive economic zone.

For example, a cargo ship traveling from China to the United States would have the right to transit passage through the Strait of Malacca, a narrow waterway between Malaysia and Indonesia, in order to reach its destination. Similarly, an airplane flying from Europe to Asia would have the right to transit passage through the airspace over Russia.

These examples illustrate how transit passage allows for the free movement of goods and people between different parts of the world, without being subject to unnecessary restrictions or delays.