Maritime Advisory Warns Neutral Ships of Checks Under Iran Port Blockade

A maritime security advisory issued on October 28 warns that neutral vessels near Iranian ports may face questioning, boarding and searches under the U.S. blockade. The Joint Maritime Information Center notice, identified as JMIC 016-26, covers the Gulf, Strait of Hormuz, Gulf of Oman and Arabian Sea and describes the regional threat level as "severe." The advisory includes a notice from U.S. Naval Forces Central Command's shipping-coordination office. It describes a blockade covering all Iranian ports and coastlines, regardless of a vessel's flag or ownership. The U.S. notice attributes the measure to Iranian aggression and attempts to control the Strait of Hormuz. Neutral ships carrying neutral cargo, or sailing without cargo between neutral ports, can be checked to establish their intentions concerning the blockade. Masters are told to keep watch on VHF Channel 16 and be ready to change course or stop when directed by U.S. forces. The requested paperwork includes clearance from the previous port, a signed and stamped appointment letter from the next port's agent, and, where applicable, supply or repair contracts and berth-booking confirmation. Email alone is not accepted for the agent's appointment letter; requested documents must be signed or stamped and provided as PDFs. The notice urges vessels that do not need to enter the region to remain clear. Ships that do transit are advised to allow extra time for dense traffic and blockade-enforcement activity. Shipping inquiries are directed to the U.S. command's Naval Cooperation and Guidance for Shipping office.