Iran Resumes Mine Warfare Tactics to Attack Oil Tankers in the Strait of Hormuz
nashnova research
Iranian operatives on a speedboat attached two limpet mines to the Dubai-flagged tanker Louise 1 in the Strait of Hormuz — the first use of such weapons in the Middle East since June 2019. Crude transit through the strait has already halved, and shipowners' willingness to sail is now the binding constraint on Gulf oil supply.
What happened?
At roughly 22:15 local time on Thursday, a small boat approached the tanker Louise 1. Personnel affixed two explosive devices to the hull above the waterline, then detonated them, starting an engine-room fire.
Limpet mines — small magnetic bombs attached by hand to a ship's hull — had not been used in the Middle East since June 2019, over five years ago.
This means → Iran has pulled an old tactic back out of storage, expanding its arsenal from missiles alone to a mine + missile + drone combination.
Why do mines frighten shipowners more than missiles?
Missiles and drones strike ships under way. Mines can be attached to vessels sitting at anchor — a zone previously considered relatively safe.
Martin Kelly, CEO of maritime security firm Orbital Risk Intelligence, put it bluntly: shipowners will say, "There are mines now — we're not going through."
In plain terms = missiles make sailing dangerous; mines make standing still dangerous too — and that is what terrifies shipowners most.
How else has Iran escalated its attacks?
Beyond mines, Iran has recently fired cruise missiles at transiting vessels. On the same day, another tanker and a dhow were struck by missiles and caught fire inside the strait.
Drones are being aimed specifically at ship funnels — the funnel connects directly to the engine room, channeling blast force into the most critical compartment.
Iran is also spreading false attack reports, widening the geographic scope of strikes, and increasing their tempo to amplify psychological pressure.
How badly has Hormuz traffic been hit?
Commodity data platform Kpler reports that in the seven days to October 29, crude exports through Hormuz ran at 8.7 million barrels per day — down roughly 51% from the pre-conflict baseline.
The number of transiting vessels has shrunk sharply from a pre-war level of around 135 ships.
This means → half the carrying capacity that once flowed through the world's most important oil chokepoint has already rerouted or stopped sailing.
What comes next?
Kelly noted that the first two weeks of October were the most intense period of shipping attacks since this round of conflict began.
Trump has warned Middle East allies to prepare for possible military action and hinted at resuming strikes on Iran after the U.S. midterm elections.
This reflects a dynamic moving in two directions at once: Iran is escalating its methods while the U.S. signals retaliation — the risk boundaries of the Strait of Hormuz are expanding from both sides.
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