# IMO estimates 80 mines block Hormuz's historic shipping lane as clearance operations begin
> The UN's maritime agency counted roughly 80 explosives in the Traffic Separation Scheme; two alternative corridors have formed, one US-coordinated along Oman's coast, one Iran-controlled closer to the Iranian shore

**Meta:** type: story · date: 2026-06-26 · heads: 谁的钱, 什么崩了 · 6 takes · 4 lenses · 4 regions

## Summary

The International Maritime Organization estimated on Friday, 26 June, that approximately 80 mines are deployed in the Traffic Separation Scheme, the traditional central shipping lane through the [Strait of Hormuz](/zh/entity/place/strait-of-hormuz) that handles roughly 20 percent of global oil flows. The estimate quantifies, for the first time, the scale of explosive contamination left by the Iran war and explains why commercial shipping has not returned to its historic routing despite the June 17 Islamabad Memorandum of Understanding ceasefire. Two flanking corridors have formed in place of the historic lane: one runs close to Oman's shore, coordinated by the US Navy and Joint Maritime Information Center, while a separate corridor veers toward the Iranian coast under Tehran's control. The UKMTO raised the regional threat level to "substantial" on June 27 following the [VLCC菊号在霍尔木兹海峡遭到袭击，英国海事机构将威胁等级升至「重大」](/zh/n/hormuz-vlcc-kiku-strike-jun27) and separately warned mariners of the presence of floating mines. Mine-clearance operations by a multinational naval force are ongoing, but the IMO gave no timeline for restoring the central lane.

## Why it matters

With 80 mines estimated in the main channel, the strait's full capacity, roughly 17-21 million barrels per day of crude and products, cannot be restored quickly. Western maritime security sources cite a 40-to-50 day clearance window before the industry is confident enough to return to the historic lane, keeping the [双重咽喉要道关闭推动集装箱运费大幅攀升](/zh/n/hormuz-cape-diversion-freight) premium in place and sustaining pressure on global energy prices even after a formal ceasefire holds. Traffic has recovered to roughly 50% of pre-crisis levels on the flanking corridors; full normalisation requires clearing the central channel.

## Regional takes (batched by bias / lens)

### financial press, shipping and energy focus
- **Bloomberg** (United States, en) — Reported the IMO's estimate of approximately 80 mines deployed in the Traffic Separation Scheme, the historic central channel through the [[strait-of-hormuz]], and described how the crisis has bifurcated commercial transit into two flanking corridors. Named the three Bloomberg reporters covering the maritime beat.
  > "The Strait of Hormuz has about 80 mines in its historic shipping lanes, the UN's International Maritime Organization estimated Friday, showing how difficult it will be to return the key oil channel to normal."
  Source: https://www.bloomberg.com/news/articles/2026-06-26/imo-estimates-there-are-80-mines-in-hormuz-s-normal-ship-channel

### specialist maritime trade press
- **gCaptain** (United States, en) — Cross-referenced the IMO estimate with UKMTO advisories warning mariners of floating mines and ongoing mine-clearance naval operations, and noted that the southern Oman-coast corridor remains the preferred commercial route.
  > "UKMTO cautioned that active mine-clearance operations remain underway and warned mariners of the continued presence of mines in parts of the area."
  Source: https://gcaptain.com/imo-estimates-there-are-80-mines-in-hormuzs-shipping-lanes/

### unlabelled
- **IMO (JMIC Advisory Note)** (Global, en) — Joint Maritime Information Center advisory on Strait of Hormuz transit, confirming mine-clearance operations and the designation of the southern Oman-coast corridor as the preferred route for commercial traffic.
  Source: https://wwwcdn.imo.org/localresources/en/MediaCentre/HotTopics/Documents/JMIC%20Advisory%20Note%2000926%20SoH%20open.pdf
- **Euronews** (Europe, en) — 
  Source: https://www.euronews.com/2026/06/27/uk-maritime-agency-raises-strait-of-hormuz-threat-level-after-oil-tanker-reports-being-str
- **Seatrade Maritime** (Global, en) — 
  Source: https://www.seatrade-maritime.com/tankers/mine-clearance-top-priority-for-hormuz-safety-say-tanker-owners

### Canadian broadsheet; cites five Western maritime security sources on clearance timeline
- **The Globe and Mail** (Canada, en) — Citing five Western maritime security sources, The Globe and Mail reported mine-clearance operations could take 40 to 50 days before insurance, shipping, and oil companies are confident enough to transit the historic channel. The methodical nature of sonar sweeping, mine identification and neutralisation means the timeline cannot be accelerated by political will alone.
  > "Mine clearance in Hormuz could take 40 to 50 days, five Western maritime security sources say, as the process cannot be accelerated by political will."
  Source: https://www.theglobeandmail.com/world/article-strait-hormuz-mines-shipping-oil-iran-peace/

## Across the graph
- Related: [[hormuz-vlcc-kiku-strike-jun27]], [[hormuz-ever-lovely-attack-jun25]], [[hormuz-imo-evacuation-pause-jun25]], [[hormuz-oil-supply-shock]], [[hormuz-cape-diversion-freight]], [[irgc-oman-hormuz-route-rejection-2026-06-25]]
- Entities: Place:strait of Hormuz, Iran, Commodity:opec

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Canonical: https://rbtfl.xyz/zh/n/hormuz-mines-imo-estimate-jun26