Mine Threat On Hormuz: How Iran's Stealthy Maham Series Turned Key Strait Into High-Risk Chokepoint

Last Updated:March 31, 2026, 19:18 IST

Posing a serious threat to maritime security, this new breed of silent mines – estimated to be fewer than a dozen – have been deployed to serve as a selective deterrent to ships

Having denied earlier in the war that it laced the Strait of Hormuz with sea mines to deter ships from crossing, there has been rising evidence of Iran’s stealthy Maham-series mines turning the key energy waterway into a veritable high-risk chokepoint.

Posing a serious threat to global maritime security amid escalating tensions in the West Asia conflict, this new breed of silent sentinels – estimated to be fewer than a dozen – have been strategically deployed to serve as a selective deterrent to ships.

According to top Indian intelligence sources, these sea mines represent a shift towards an asymmetric “low-cost and high impact" tactic, effectively allowing Iran to enforce a “selective tollbooth system" within the Strait of Hormuz, one of the world’s most critical maritime chokepoints.

WHAT ARE THESE ‘SMART INFLUENCE’ MINES?

Indian intelligence sources told News18 that unlike the primitive contact mines of previous eras, the Maham series – specifically the Maham-3 and Maham-7 – are advanced “influence mines" that do not require a direct hit to terminal effect.

The sources said these “sensor fused weapons" use a sophisticated array of magnetic, acoustic, and pressure sensors to trigger detonations. The Maham-3 is a moored buoyant influence mine, while the Maham-7 is a bottom-dwelling stealth influence mine.

They said as they are designed to detonate based on the signature of a passing vessel rather than physical impact, they are exceptionally difficult for naval forces to neutralise. These mines are nearly impossible to detect visually or via standard sonar at the depths of the strait. Their advanced sensor suites allow them to evade traditional sweeping tactics, presenting a significant challenge for modern mine-hunting operations, they added.

WHY HAS IRAN DEPLOYED THESE MINES?

The sources said Iran’s deployment of these mines is not as a traditional blanket minefield, but as a selective deterrent designed to complement its existing fleet of fast-attack boats and anti-ship missiles.

They said this asymmetric approach creates an environment of extreme high risk that threatens the consistent flow of global oil. The psychological impact of this strategy is profound.

Seafarers, the sources said, are experiencing heightened levels of anxiety over the prospect of proximity-triggered underwater explosions. Despite CENTCOM’s recent efforts to degrade Iran’s capabilities, including the destruction of 44 Iranian minelayers, small fast boats, and helicopters, the persistent threat of these stealthy weapons remains a primary concern for maritime operators.

The strategy allows Iran to target specific vessels or countries while offering “selective safe-passage" to friendly partners, reinforcing the “tollbooth" nature of the chokepoint, the sources said. For the seafarers tasked with navigating these treacherous lanes, the response has been one of extreme caution.

At present, they said, Indian shipping agencies and operators are currently undergoing continuous briefings to address the ongoing threat of navigation interference and potential mine-laying activity. The primary defensive recommendation for maritime operators is route unpredictability.

By avoiding established patterns, vessels hope to decrease the likelihood of triggering the sophisticated sensors of the Maham series, they said. But even with such measures and the possibility of safe-passage approvals for certain countries, the environment remains one of “extreme caution" as the conflict rages.

Iran’s Revolutionary Guards have effectively controlled Hormuz from the beginning of the war, choking it to oil traffic and, as a result, causing massive disruption in global markets and prices. This is, however, not the first time Tehran has used the mining tactic – it did so in the 1980s as well, making it a nightmare for western demining teams.

WHAT ARE SEA MINES, DOES IRAN HAVE OTHERS?

According to an AFP report, which quoted a former senior officer with the French navy, “mines are the weapon of the poor" and yet “they pose a fundamental threat to maritime trade and to the freedom of action of naval forces."

Elie Tenenbaum, a researcher at the French Institute for International Relations (IFRI), told AFP that Iran is estimated to have some 5,000 to 6,000 naval mines, including “drifting mines that are extremely difficult to intercept" – like the Maham series. Contact mines can drift around on the surface with the current or can be moored to an anchor on the sea floor, and they explode when they come into contact with a ship’s hull.

“It’s the most rudimentary mine, the cheapest one, and the main threat in the Strait of Hormuz," the French told AFP on condition of anonymity.

The report said the Iranians also have influence mines adapted to the Gulf’s shallow waters, which are sown on the seabed and explode when a large ship is detected overhead. They could also use speedboats to attach limpet mines to the hulls of ships, which would be set to explode at a certain time.

HAS IRAN DONE THIS BEFORE?

The AFP report said Iran deployed sea mines during its conflict with Iraq in the 1980s during the so-called “tanker war", forcing the United States to escort commercial ships.

During the Gulf war in 1991, Iraqi forces deployed 1,300 mines badly damaging two US navy ships, including the USS Princeton, which it cost about $100 million to bring back on line, as per US researcher Scott Truver, who has taught at the Naval War College.

“It took the multinational coalition forces more than two years of intensive mine-countermeasure operations to declare the northern gulf mine free," Truver wrote in 2012.

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