Wednesday, March 11, 2026

Iran’s Stranglehold on the Strait of Hormuz

By Jim Geraghty

Wednesday, March 11, 2026

 

The good news is U.S. Central Command reported that American forces destroyed 16 Iranian minelayers near the Strait of Hormuz Tuesday.

 

The bad news is that the remaining Iranian military has quite a few mines — an estimated 2,000 to 6,000 naval mines largely produced by Iran, China, or Russia, according to U.S. officials talking to CBS News — and they don’t sound particularly difficult to deploy.

 

Back in 2019, the U.S. Defense Intelligence Agency’s analysis of Iran’s naval capability concluded, “Iran has an estimated inventory of more than 5,000 naval mines, which include contact and influence mines. Both navies have devised strategies to rapidly deploy mines while improving force survivability. Iran has a variety of vessels that can lay mines, but the IRGCN has integrated its doctrine of using smaller, faster vessels into its mine-laying strategy. Iran has equipped many of its Ashoora small boats with mine rails capable of holding at least one mine.” While that report could not specify how many Ashoora boats the Iranian navy has, it noted they have “hundreds of small boats throughout the Persian Gulf.”

 

Scott Savitz is a senior engineer at RAND and a professor of policy analysis at the RAND School of Public Policy, who worked in Bahrain supporting the U.S. Navy from 2001 to 2003. He offered a detailed perspective on the uses and risks of mines in a March 5 interview with the China-Russia Report, including this concise explanation of the two main types of mines: “Contact mines detonate when a ship collides with them, while influence mines respond to the characteristic signatures of a ship in their vicinity, such as a ship’s magnetism, the sounds it generates, and the pressure drop it creates. Most contact mines are moored or drifting, and moored contact mines are the classic ‘spiky balls’ that most people envision when they think of mines, while most influence mines are bottom mines.”

 

And according to U.S. officials talking to CNN, Iran is starting to put those mines to the Strait, which is about 21 miles across at its narrowest point:

 

Iran has begun laying mines in the Strait of Hormuz, the world’s most important energy chokepoint that carries about one-fifth of all crude oil, according to two people familiar with US intelligence reporting on the issue.

 

The mining is not extensive yet, with a few dozen having been laid in recent days, the sources said. But Iran still retains upward of 80 percent to 90 percent of its small boats and mine layers, one of the sources said, so its forces could feasibly lay hundreds of mines in the waterway.

 

One wonders how many mines the Iranian regime wants to put into the Persian Gulf or Strait of Hormuz, because this is their primary trade route, and vital for their customers in China. (More on Iranian oil shipments to China below.) Once mines get laid, they are a pain in the neck to mitigate, as Savitz explained:

 

Mines create a cornucopia of problems for those trying to transit and operate in potentially mined waters. They may not know that the minefield exists or what its boundaries are, let alone the number and types of mines present. For example, all three U.S. warships that were damaged by mines in the Persian Gulf from 1988-1991 had no idea they were in minefields until mines detonated beneath them. Mine countermeasures (MCM) operations are slow and painstaking, frustrating the rest of the fleet as it waits to enter the mined area. MCM assets move slowly in predictable patterns with few defensive capabilities of their own, making them easy targets, and they’re generally designed for low signatures rather than durability. Mine clearance is often incomplete, and there is always uncertainty about the extent of residual risk, aside from the tough judgments about whether it has been reduced to an acceptable level. After all the delays associated with MCM, the fleet has to slowly transit a cleared lane, making its movements predictable while diminishing ships’ ability to maneuver in response to other threats. Mines have powerful synergies with other weapons that can take advantage of these vulnerabilities. . . .

 

Iran depends on the Strait of Hormuz for its own commercial traffic, so it will likely prefer to mine other areas of the Gulf, as it did in the 1980s. It can selectively target ships in the Strait of Hormuz using other weapons, such as missiles and explosive-laden boats (with or without people aboard). The speed with which mined waters can be reopened depends on risk tolerance and resource commitment. Tankers were willing to run the gauntlet of mine risk in the Persian Gulf during the 1980s, paying correspondingly elevated insurance rates, and some of them were damaged. . . .

 

While the Iranians are presumably keeping detailed maps and GPS coordinates of where they’ve laid their mines, the more mines that the Iranians lay in the Gulf, the more likely it is that a mine ends up damaging one of their tankers or China’s tankers. Then again, the Iranian military may not be doing a lot of long-term thinking right now. They need ships to be afraid to sail through the Strait, for oil prices to skyrocket, and for the U.S. to decide to call it a day.

 

Then again, the U.S. may have some new countermeasures against enemy mines. Back in late 2022, DefenseNews reported, “The Navy has a number of programs in the works for small mine warfare and mine countermeasures UUVs — Unmanned Underwater Vehicles, or basically underwater drones.”

 

At 4:07 p.m. Tuesday, the commander in chief took to Truth Social to demand the remaining Iranian regime remove any mines from the Gulf:

 

If Iran has put out any mines in the Hormuz Strait, and we have no reports of them doing so, we want them removed, IMMEDIATELY! If for any reason mines were placed, and they are not removed forthwith, the Military consequences to Iran will be at a level never seen before. If, on the other hand, they remove what may have been placed, it will be a giant step in the right direction! Additionally, we are using the same Technology and Missile capabilities deployed against Drug Traffickers to permanently eliminate any boat or ship attempting to mine the Hormuz Strait. They will be dealt with quickly and violently. BEWARE!

 

Yesterday, Reuters reported, “The U.S. Navy has refused near-daily requests from the shipping industry for military escorts through the Strait of Hormuz since the start of the war on Iran, saying the risk of attacks is too high for now, according to sources familiar with the matter.”

 

This morning, CNBC reported:

 

Three vessels off Iran’s coast have been struck by projectiles, the United Kingdom Maritime Trade Operations said on Wednesday, the latest in a flurry of incidents reported in or near the Strait of Hormuz.

 

One of the ships reported it had been struck 11 nautical miles north of Oman in the Strait of Hormuz, causing a fire onboard and forcing the crew to evacuate, the UKMTO said. . . .

 

Two other incidents were also reported on Wednesday morning, with one vessel struck by a projectile about 50 nautical miles northwest of Dubai and another sustaining damage off the coast of the United Arab Emirates.

 

The maritime news site Windward reported yesterday, “Commercial activity through the Strait of Hormuz fell again on March 9, with only a single outbound Iranian-flagged vessel recorded and no inbound movements observed.”

 

But, as this newsletter has emphasized this week, one country is getting its flagged ships through the Strait comparably easily:

 

Iran has continued to send large amounts of crude oil via the Strait of Hormuz to China even as the war between U.S.-Israel and Iran has jeopardized broader supplies through the critical waterway.

 

Iran has sent at least 11.7 million barrels of crude oil through the Strait of Hormuz since the war began on Feb. 28, all of which were headed to China, Samir Madani, co-founder of TankerTrackers, told CNBC on Tuesday.

 

The firm monitors vessel movements with satellite imagery, allowing it to capture vessels that would otherwise go undetected if their tracking systems are switched off. Many vessels have “gone dark” after Tehran threatened to attack any vessel attempting to pass through the waterway.

 

Among the comments from chairman of the Joint Chiefs of Staff General Dan Caine in yesterday’s Pentagon briefing:

 

U.S. Strategic Command bombers recently dropped dozens of 2,000-pound GPS penetrating weapons on deeply buried missile launchers across the southern flank. We also have struck several one-way drone factories to get at the heart of their autonomous capability.

 

Ballistic missile attacks continue to trend downward 90 percent from where they’ve started, and one way attack drones have decreased 83 percent since the beginning of the operation, a testament to our air defenders and our air defense systems. And as I said, our partners in the region continue to do great work as well.

 

Second, we’re making substantial progress towards destroying the navy in the first ten days of the conflict. We’re more than 50 Iranian naval ships into the campaign using a combination of artillery, fighters, bombers and sea launched missiles. As Admiral Cooper noted last Thursday, we struck and sank an Iranian drone carrier ship, and U.S. CENTCOM continues today to hunt and strike mine laying vessels and mine storage facilities. This — this work will continue. . . .

 

No plan survives first contact with the enemy or Murphy. They’re adapting, as are we. Of course, we have very entrepreneurial warfighters out there. I’d rather not, for operational security reasons, tell them what’s working. So, I’ll — I’m gonna non-answer that question based on that. But we are watching uh what they’re doing, and we are adapting faster than they are.

 

Yesterday, our Thérèse Shaheen noted that while our ideal outcome is a new regime, a significantly defanged foe would still represent a substantial improvement in our circumstances:

 

Eliminating that threat — to ourselves, and in partnership with Israel, to themselves — is justifiable, even without having a clear sense of what might come next for the Iranian people. The military operation is diminishing the ability of the regime to threaten the U.S. and allies in the region and globally. Curtailing Iran’s ability to do that, even if a government remains that is otherwise unfriendly, is justified. Failing to eliminate the regime may not immediately improve the circumstances of the Iranian people, but the military operation to end the threat to the U.S. includes significant destruction of the internal security apparatus that is harming ordinary Iranians. Life under the mullahs has been decades of repression, torture, and death for many who stayed; exile and separation from their homeland for those who fled. The theocracy has caused untold death and suffering for decades, and the risk for more of that was unacceptably high.

 

ADDENDUM: Our Audrey Fahlberg, the human bombshell scoop machine, continues her run: “Discussions are underway at the Department of Homeland Security about reevaluating plans to buy a Boeing 737 MAX luxury jet that had been used by Kristi Noem prior to her ouster as DHS secretary, National Review has learned. Dubbed the ‘Big Beautiful Jet’ by DHS staffers, the luxury jet and its private cabin have become a major source of consternation among Republicans at the department and the White House.”

 

We all know the true “Big Beautiful Jet” is now quarterback Geno Smith.

 

Or safety Minkah Fitzpatrick. Or linebacker Demario Davis.

 

Or edges Joseph Ossai and Kingsley Enagbare, or defensive tackle David Onyemata, or safety Dane Belton, or cornerback Nahshon Wright.

 

It’s been a busy free agency period.

 

 

No comments: