US Central Command announced it has achieved "maritime superiority" in the waters around Iran, with the blockade of all Iranian ports operationally complete within 36 hours of its launch on Monday. Admiral Brad Cooper, CENTCOM commander, stated that all sea trade going into and out of Iran has been halted. The operation is being enforced "impartially" against vessels of all nations, with US Navy guided-missile destroyers serving as the primary enforcement assets. Eight oil tankers linked to Iran have been forced to turn back since Monday, all complying with radio orders without requiring boarding. A US destroyer specifically intercepted two tankers departing Chabahar Port on the Gulf of Oman, ordering them to reverse course.
The sanctioned tanker Rich Starry provides a telling illustration of the blockade's grip: shipping data shows it exited the Gulf on Tuesday but turned back toward the Strait of Hormuz on Wednesday after failing to break through the cordon.
The blockade represents a significant escalation of the economic pressure campaign. By halting all Iranian maritime trade — not just oil — Washington is attempting to force Tehran back to negotiations through comprehensive economic isolation. The risk is that this pressure creates either an Iranian military response or a broader confrontation with China, whose tankers are explicitly being warned away from Iranian oil.