IC Operations & Tradecraft — 2026-09-08

US Navy SEALs Conducted Covert Four-Month Mine-Clearing Mission in Strait of Hormuz

BLUFDespite Washington's declared all-clear, full restoration of pre-February commercial shipping volumes through the Strait of Hormuz by March 2027 is very unlikely while Iran retains the capacity to reseed cleared waters.

US Navy SEAL divers spent four months conducting a covert operation to locate and destroy mines in the Strait of Hormuz, working with unmanned surface vessels, submersibles and sonar systems, often at night, the Financial Times reported Sunday 123. The operation ran amid ongoing US-Iran strikes in and around the strait and sought to reopen the waterway to commercial traffic that had largely avoided it since February 1. President Trump said last week that "all" mines in the strait's international waters had been removed or destroyed, a claim the US military subsequently confirmed 13. No US casualties were reported 12. Shipping executives and maritime security advisers told the FT they believe waters near Oman have likely been cleared but remain less certain about the rest of the strait 12.

Analysis
Full restoration of pre-February shipping volumes through the strait is very unlikely by March 8, 2027, given Iran's demonstrated capacity and incentive to re-seed cleared waters. This assessment carries low confidence, resting on a single primary account: the Financial Times investigation, reproduced without independent corroboration by Jerusalem Post, Iran International, Israel Hayom, and i24NEWS, with no confirmation for waters beyond the Oman corridor. Tehran's leverage lies in ambiguity. Even absent new strikes, the mere possibility of fresh mines keeps insurers wary and shipowners routed through the narrower US-patrolled corridor. Trump's "all clear" declaration may function more as reassurance messaging than verified operational fact, particularly with continued US-Iran strikes around the strait undercutting any clearance's durability. Short of full resolution, the Navy must sustain costly SEAL-led mine-countermeasure operations while insurers and shippers hold off retiring war-risk premiums for the wider waterway.
6 sources
  1. US Navy SEALS conducted covert four-month mission to clear Strait of Hormuz mines - report - Jerusalem Post
  2. US carried out covert four-month Hormuz mine-clearing mission - FT - Iran International
  3. US conducted secret four-month mission to clear Iranian mines from Strait of Hormuz - report - i24NEWS
  4. Secret Navy SEAL operation in Strait of Hormuz revealed - Israel Hayom
  5. US carried out covert four-month mission to clear mines from Strait of Hormuz - Financial Times
  6. US carried out covert four-month mission to clear mines from Strait of Hormuz - Financial Times

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