Accession to UNCLOS would help safeguard navigational rights from steady erosion by excessive claims

Joining this Convention would codify several important recognized rights of navigation into a binding legal foundation. It supports our national security interests by defining the rights of U.S. military and civilian vessels as they meet our mission requirements, reaffirms the sovereign immunity of our warships and other vessels owned by the United States and used for government noncommercial service, and preserves our right to conduct military activities and operations in exclusive economic zones. As the defense strategy places greater demands on our ability to mobilize forces, guaranteed access to shipping and overflight lanes becomes increasingly important to support our forces overseas.

Currently, the United States relies upon customary international law as the primary legal basis to secure global freedom of access. However, as emerging powers around the world grow and modernize, states may seek to redefine or reinterpret customary international law in ways that directly conflict with our interests, including freedom of navigation and overflight, potentially challenging our global mobility needs. This Convention represents the best guarantee against erosion of essential navigation and overflight freedoms that we take for granted through reliance on customary international law. Accession will give the United States leverage to counter efforts by other nations seeking to reshape current internationally accepted rules we depend on for transporting cargo and passengers.