3 things to know about naval blockades as U.S. begins patrols in the Strait of Hormuz - NPR

The U.S. Navy has begun patrols intended to choke off Iran’s oil export revenue, but experts warn blockades are unpredictable and hard to sustain; open-source tracking now shows about 20 warships positioned to enforce the blockade, underscoring the scale and strain of the effort. Early interdictions demonstrate short-term enforcement capability, but carrier movements such as the USS Nimitz’s circumnavigation and repositioning highlight competing global demands that could complicate long-term coverage, especially amid recent leadership uncertainty.