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NAVAL BLOCKADE

Official Iranian Notice to Mariners S. 09/2026 dated 17 April 2026, showing the text and navigational chart of two designated one-nautical-mile transit corridors for commercial vessels crossing the Strait of Hormuz, issued by Iran’s Ports and Maritime Organization under IRGC Navy authority

One nautical mile

Iran declared the Strait of Hormuz open for commercial shipping — then reversed course thirty hours later. The Notice to Mariners it published tells a different story than the headlines did