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Jun 25, 2026
Analyzed by GPT OSS 120B

How Minesweeping in the Strait of Hormuz Works: A Visual Guide

AI Summary
A new US‑Iran framework obliges Tehran to clear mines from the Strait of Hormuz within 30 days, launching a multinational de‑mining effort. This article explains the types of mines, the painstaking clearance process, and what the timeline means for global oil shipments.

Framework Agreement Sets a 30‑Day Demining Clock

Last week the United States and Iran signed a framework agreement that ties the reopening of the strategic waterway to a rapid mine‑clearance mandate. Under the deal, Iran must remove any naval mines within 30 days, while France and the United Kingdom lead the operational effort, supported by Germany, Italy, Japan and Canada.

  • Agreement signed: June 22, 2026
  • Clearance deadline: 30 days from signing
  • Key de‑mining partners: France, UK, Germany, Italy, Japan, Canada

Types of Naval Mines Threatening the Strait

Naval mines are low‑cost, high‑impact weapons that can cripple super‑tankers worth hundreds of millions of dollars. The most common variants found or feared in the Hormuz corridor are:

  • Bottom mines – rest on the seabed and trigger on magnetic, acoustic or pressure signatures.
  • Moored mines – anchored below the surface, exploding on contact or proximity.
  • Drifting mines – free‑floating, carried by currents far from their original drop point.
  • Limpet mines – attached directly to a vessel’s hull, often timed.

Mine Countermeasure Operations: Hunting vs. Sweeping

Clearing mines involves two complementary tactics:

Mine hunting

Ships deploy sonar‑equipped drones and remotely operated vehicles (ROVs) to locate individual devices. Modern systems can scan large swaths of seabed, but operators must differentiate mines from rocks, wreckage and other debris.

Minesweeping

Towed equipment either cuts the anchor cables of moored mines or mimics a ship’s magnetic and acoustic signature to trigger premature detonations. This method clears areas without pinpointing each device.

Why the Clearance Process Extends Beyond the 30‑Day Deadline

Even after the formal deadline, full safety certification can take weeks or months. Insurers and shipping firms require repeated sweeps to confirm that no residual mines remain, especially given the difficulty of detecting drifting mines that may re‑appear in cleared lanes.

  • Verification cycles: multiple sweeps per lane
  • Insurance impact: premiums rise sharply on any perceived threat
  • Economic stakes: a single mine can halt a lane carrying billions of dollars of oil daily

Future Outlook: From Partial Reopening to Full Normalcy

Analysts expect a phased return of traffic. Initial voyages will likely be limited to vessels with low‑risk profiles, while larger super‑tankers wait for comprehensive clearance reports. Continued diplomatic pressure and the visibility of multinational de‑mining teams should accelerate confidence, but the lingering risk of undiscovered drifting mines means the strait may remain a “high‑alert” zone for the foreseeable future.