Could Clearing Hormuz Mines Take Six Months? The Pentagon Estimate Is Real—but It May Already Be Out of Date
A six-month mine-clearing timeline was reported from a classified Pentagon briefing in April. CENTCOM later said key shipping lanes were cleared, while Iran disputes the US account.
A six-month estimate for clearing mines from the Strait of Hormuz sounds like a warning that global shipping could remain disrupted well into 2027. The estimate is real—but it was reported in April, and the situation has since changed. CENTCOM said in August that US forces had cleared mines from internationally recognized shipping routes and repeated that claim on October 28. Iran's Revolutionary Guard disputes the American account. The question now is not simply how long clearance might take, but what each side means by “cleared” and whether commercial operators believe the route is safe.
Where the six-month figure came from
The Washington Post reported on April 22 that a senior Defense Department official gave Congress an estimate of up to six months to fully clear the strait of Iranian mines, citing officials familiar with a classified briefing. The report said a comprehensive operation might not begin until the war ended. Mine clearance is slow by design: teams must detect and classify objects, verify whether they are mines and neutralize them without endangering ships or crews. The size and location of any minefield can be uncertain.
That estimate described a contingency at a particular point in the conflict. On August 28, CENTCOM commander Admiral Brad Cooper said the US had cleared mines from international shipping lanes. The command reiterated on October 28 that the recognized primary transit routes had been cleared. Iranian state-linked reporting says the IRGC challenged the claim. Separately, Tehran has claimed tankers struck mines in recent days; US officials have denied or disputed some Iranian accounts. These competing statements make it difficult to infer the full state of the seabed from headlines alone.
Cleared does not necessarily mean risk-free
A military declaration about shipping lanes may refer to defined routes, not every part of the strait or every possible hazard. Commercial shipowners consider insurance, attacks, navigation restrictions and crew safety as well as mines. Even after a route is swept, missile or drone threats, political closures and uncertainty can keep traffic below normal levels. In August, shipping-industry reporting noted that confidence had not fully returned despite CENTCOM's announcement.
The distinction matters because roughly a fifth of global seaborne oil and gas trade normally passes through Hormuz. A prolonged disruption can raise energy prices, shipping costs and insurance premiums far beyond the Gulf. The war has already created economic pressure, and each side has incentives to portray the waterway as either secure or still under threat.
What can be responsibly said now?
The April briefing is evidence that US officials once viewed a full clearance operation as potentially lengthy. It is not, by itself, proof that clearance still requires six months today. CENTCOM says the main international lanes have been cleared; Iran disputes US claims and continues to warn of danger. Independent maritime reporting and actual vessel movements are key measures, but those too can change daily.
Are the shipping lanes physically safe, politically accessible and commercially insurable—or only described as cleared by one side? And what evidence would persuade shipowners that normal transit can resume? The answer will depend on transparent incident reporting, independent assessments and a credible reduction in attacks, not merely a timeline repeated without its date.
The commercial risk remains even after clearance claims
Mine clearance is only one part of restoring reliable transit. Shipping firms look for consistent rules on permitted routes, safe passage, naval escorts, insurance coverage and what happens if a vessel is detained or attacked. A declaration of clearance by a military command may reduce one risk but cannot compel shipowners to sail. Iran's competing claims and the history of attacks make independent verification especially valuable.
The consequences reach consumers far from the Gulf. If fewer tankers transit, energy prices can rise, freight becomes more expensive and governments may draw on strategic reserves. But the market responds to expectations as much as confirmed shortages. Should the public treat official announcements as sufficient assurance, or wait for sustained commercial traffic and third-party monitoring? The six-month timeline is dramatic; today's operational reality depends on evidence after that briefing.