U.S. Marines board Iranian‑flagged tanker MT Celestial Sea, social posts report

U.S. Central Command said on May 20 that U.S. Marines boarded the Iranian-flagged commercial oil tanker M/T Celestial Sea in the Gulf of Oman, searched it and then released it after ordering the crew to alter course. Reuters, citing a CENTCOM statement, said the vessel was suspected of trying to violate a U.S. blockade by heading toward an Iranian port. The episode moved a social-media claim into a documented military action. It also landed in the middle of a broader confrontation over shipping through the Strait of Hormuz, where the United States says it is enforcing a blockade on vessels entering or leaving Iranian ports and Iran’s Revolutionary Guards say ships must coordinate passage with them. (usnews.com) ### What do we actually know about the boarding? Reuters reported on May 20 that U.S. forces boarded M/T Celestial Sea after suspecting it had violated the blockade, and that the ship was released after a search and a course change. Maritime Executive, citing CENTCOM, reported that Marines from the 31st Marine Expeditionary Unit carried out the boarding. (centcom.mil) The Gulf of Oman was the location given in both Reuters’ account and the CENTCOM-linked reporting surfaced by Yahoo and other syndications. The available reporting does not show CENTCOM alleging that the tanker fired on U.S. forces or that the crew resisted the boarding. ### Where does the “91 vessels” number come from? CENTCOM-linked reporting on May 20 said the Celestial Sea case brought the number of commercial ships redirected under the blockade to 91. (usnews.com) Maritime Executive reported that figure directly from CENTCOM’s public post, and Reuters’ syndicated account tied the boarding to the same blockade enforcement campaign. (yahoo.com) CENTCOM announced the blockade policy on April 19, saying it would apply to vessels of all nations entering or departing Iranian ports and coastal areas, while not impeding traffic bound for non-Iranian ports through Hormuz. Earlier CENTCOM releases also described other enforcement actions, including disabling vessels it said were attempting to reach Iranian ports. (maritime-executive.com) ### What about the reports that ships are coordinating with Iran’s IRGC? Al Jazeera reported on May 20 that Iran’s Islamic Revolutionary Guard Corps said it coordinated the transit of 26 vessels through the Strait of Hormuz in the previous 24 hours. Separate reporting tied to Iranian and third-party outlets said roughly 30 vessels, including Chinese-linked ships, had passed with Iranian authorization in recent days. (centcom.mil) IranWire reported earlier that Iranian media said the IRGC had introduced a designated route for ship transit, sometimes described as the “Larak Corridor,” and that use of it required IRGC authorization. Fars-linked reports in recent days have also described ships waiting for Iranian permission to transit. (aljazeera.com) ### Why did this surface first in social posts? IranWire English and other social accounts posted on May 20 that U.S. Marines had boarded the tanker and that CENTCOM had rerouted 91 vessels. Those posts matched the later Reuters and maritime-trade reporting that attributed the action to CENTCOM. (iranwire.com) Social posts also circulated claims of a steep fall in daily crossings through Hormuz, but those traffic figures were less clearly sourced in the material reviewed than the boarding itself. A public traffic-tracking site says it publishes daily AIS-based dispatches, but its figures were not independently confirmed here. ### What happens next? CENTCOM has been issuing frequent public statements as it expands what it calls Project Freedom and related Hormuz operations, including destroyer deployments, aircraft support and vessel interdictions. (usnews.com) Reuters and maritime outlets have continued to track each new boarding, disabling action and reroute as they are announced. (hormuz-traffic.com) May 21 reporting still points readers to CENTCOM’s press releases page for new official statements, while Reuters and trade publications such as Lloyd’s List and Maritime Executive are carrying the next published details on named vessels and locations. (centcom.mil 1) (centcom.mil 2)