Iran Struggles to Clear Mines in the Strait of Hormuz

Iran’s Islamic Revolutionary Guard Corps (IRGC) has issued a map designating a danger zone littered with sea mines in the Strait of Hormuz, a move analysts describe as a coercive effort to maintain a chokehold on the critical global shipping passage. The announcement comes as shipping traffic remains at a near standstill despite a ceasefire agreement.

The map, released through the semiofficial news agencies Tasnim and ISNA, indicates a zone where various types of anti-ship mines are likely present in the main traffic area. To avoid these risks, the IRGC stated that vessels must navigate using alternate routes near Larak Island, which are located closer to the Iranian mainland.

This development occurs as negotiations to reopen the waterway are set to begin. Ceasefire talks involving Iran, the United States, and Israel are scheduled to take place in Pakistan, with the reopening of the strait serving as a primary point of discussion.

Economic and Strategic Impact

The blockade of the Strait of Hormuz—the only maritime route out of the Persian Gulf—has caused significant volatility in global energy markets. Oil prices have remained just under $110 a barrel as a result of the disruption.

The waterway is a vital choke point, measuring approximately 100 miles in length and 21 to 24 miles in width. It typically facilitates the transport of around 25 percent of the world’s seaborne oil and liquefied natural gas trade, connecting the Persian Gulf to the Gulf of Oman and the Arabian Sea for delivery to markets in Europe, China, and the United States.

According to reporting from The Independent on March 18, 2026, hundreds of ships became trapped in the Gulf shortly after Iran claimed complete control over the passage following the declaration of war.

The Nature of the Mine Threat

The U.S. Defense Intelligence Agency estimates that Iran has more than 5,000 sea mines in its stockpile. Analysts at the Stimson Center have described these weapons as some of the cheapest and simplest in Iran’s arsenal, yet among the most disruptive.

Sea mines can be deployed via submarines, ships, aircraft, or swimmers. Some units are estimated by the Strauss Center to cost as little as $1,500.

A former British naval minehunting captain explained to The Independent that these weapons are particularly difficult to clear because they can be programmed to activate through various triggers:

They wait to be activated by unwary ships passing overhead. This can be done magnetically, acoustically or by pressure, or by a combination of those. They can target individual types of ships by their signature. They can count the ships going over and let the first 10 or 20 go and then explode under the next one, when everybody had thought it was safe.

The Independent

Conflict Background

The current crisis follows a period of intense military escalation. For three weeks leading up to March 18, 2026, the United States and Israel conducted relentless airstrikes against Iran. The mining of the strait occurred within days of the war being declared.

While the IRGC continues to insist on the use of its provided map for safety, analysts suggest the threat of sea mines is being used as leverage to force global shipping companies to operate under Iranian terms and to maintain political pressure during the diplomatic process in Pakistan.