FONOPS.
Freedom of navigation operations. US Navy sailings through contested waters.
South China Sea, Strait of Hormuz, Taiwan Strait.
Why it matters: Each FONOP is a calculated message. It moves defense, energy, and shipping markets before the news cycle catches up.
Technical and plain English.
FONOPS. Freedom of Navigation Operations. A US Department of Defense program in which Navy ships and aircraft transit waters and airspace claimed by foreign nations as territorial, to assert that such waters constitute international waters under the UN Convention on the Law of the Sea (UNCLOS). Most prominently conducted in the South China Sea against Chinese maritime claims along the "nine-dash line," and around contested features such as the Spratly Islands, Paracel Islands, and Scarborough Shoal.
When the US Navy sends warships through waters another country claims, to prove the water doesn't actually belong to them. The US doesn't recognize the claim. So they sail through. If they didn't, other countries would start treating those waters as off-limits.
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