Adversary Intelligence — 2026-09-28

IRGC Navy Seizes Second US Unmanned Underwater Vehicle REMUS 600 in Strait of Hormuz Claiming Intelligence Prize

BLUFBack-to-back UUV seizure claims serve Iran's information campaign to project Strait control, and a formal US rebuttal is likely within 14 days of the September 28 announcement.

Iran's IRGC Navy announced on Sunday that it seized a second U.S. unmanned underwater vehicle in the Strait of Hormuz, identifying it as a REMUS 600 autonomous underwater vehicle intercepted during what it described as a coordinated intelligence and electronic warfare operation 12. The IRGC Navy said the vehicle has been handed over to specialists for data recovery and called the Strait "blocked," vowing continued action against unauthorized vessel passage 2. The seizure follows the IRGC's September 8 capture of an Anduril Dive-LD UUV near the Strait's entrance, which U.S. Central Command said had malfunctioned rather than been captured and carried no classified sensors 1. Euronews reported the U.S. military has denied the latest seizure claim, and a senior Iranian army commander stated "the war is not over," calling the situation "a critical and decisive stage" 3. As of Sunday, no formal U.S. statement specifically addressing the REMUS 600 claim had been reported 1.

Analysis
A formal U.S. response confirming or denying the REMUS 600 seizure is likely within 14 days, mirroring CENTCOM's swift correction of the September 8 Dive-LD claim. Iran's back-to-back UUV claims, paired with its "blocked" strait rhetoric and a senior army commander's "not over" framing, function as an information operation timed to project maritime control ahead of any U.S. rebuttal. This assessment carries low confidence, reflecting reliance on Iranian state media for technical claims and the absence of independent verification of the vehicle's recovery or condition. Silence beyond two weeks would itself signal Washington's judgment that contesting the claim publicly carries more cost than benefit.
4 sources
  1. Iran IRGC Seizes Second US Unmanned Underwater Vehicle in Strait of Hormuz - The Defense News
  2. Iran's IRGC Navy captures 2nd US-made Remus 600 UUV in Hormuz - Mehr News Agency
  3. IRGC claims, US denies seizure of underwater US drone in Hormuz - Euronews
  4. Another catch in Hormuz - Tehran Times

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