Tanker Hit by Limpet Mines in Strait of Hormuz as New Threat to Shipping Emerges

A tanker leaving the Strait of Hormuz was attacked by a small boat near Khasab, Oman. The attackers attached two explosive devices to the tanker’s port side above the waterline. Explosions started an engine-room fire and temporarily stopped the ship. The incident matters because it introduced a close-range threat to commercial shipping already facing missiles and drones.

UKMTO said the attack happened about 25 nautical miles northeast of Khasab. Maritime security sources identified the devices as limpet mines. The tanker was reportedly the LOUISE 1. Its crew survived safely, and the fire was extinguished without environmental damage. The vessel eventually continued its voyage.

The attack shows that ships can face danger even while transiting established routes. It also raises concern for vessels waiting at anchor, where devices might be attached more discreetly. UKMTO separately reported other maritime incidents nearby, showing a broader deterioration in shipping security.

A limpet mine is an explosive device attached directly to a vessel’s hull. It is designed to stay against the ship until it detonates. This makes it different from missiles or projectiles fired from a distance. The tactic matters because a small boat can approach a merchant ship and place the device at close range.

In this incident, two devices were attached above the waterline on the tanker’s port side. The explosions sparked an engine-room fire and temporarily disabled the vessel. The article identifies these weapons as limpet mines through maritime security sources. Their placement determines the type of damage they can cause.

Devices below the waterline could be more dangerous. Martin Kelly warned they could cause significant structural damage and water ingress. The attack therefore adds a concealed threat, especially for ships waiting at anchor. Detecting a small boat or device before attachment becomes critically important.

Attacks and other maritime incidents have become widespread around the Strait of Hormuz. Since the conflict began on February 28, UKMTO recorded 145 Iran-U.S. conflict-related incidents across its reporting area. Through October 28, 88 involved vessels in the Strait. These figures cover verified incidents, not every reported event.

The latest cluster included a tanker hit by explosive devices, another tanker struck by an unidentified projectile, and a dhow that caught fire, listed, and sank. UKMTO’s weekly overview counted 81 projectile strikes since July 6, with 59 occurring along the southern transit route. The agency warned that some additional incidents could not be independently verified.

Shipping has begun recovering, but remains far below normal. The latest week included 122 outbound and 155 inbound transits, compared with 114 and 127 previously. Even with that increase, combined traffic was approximately 70% below pre-conflict levels, showing the threat continues to discourage commercial voyages.

An explosive below the waterline attacks the part of a ship that keeps seawater out. A successful blast can create a breach, damage nearby machinery, and allow water to enter the vessel. That can threaten the ship’s stability and ability to continue moving. The article’s security warning describes this as potentially significant damage.

Martin Kelly said a limpet mine below the waterline would cause significant damage and water ingress. Water entering the hull can spread beyond the original blast area. If flooding affects engines or other essential systems, the ship may lose propulsion or steering. Fire and structural damage can create additional risks for the crew and cargo.

The article does not report a below-waterline strike in this incident. The devices were attached above the waterline, causing an engine-room fire and temporary disablement, but no environmental impact. The warning is especially serious for ships at anchor, where attackers may have more opportunity to place explosives undetected.

The reported attack marked a return to a tactic associated with Iran-linked maritime attacks in 2019. Maritime security sources said this was the first reported successful use of limpet mines against merchant shipping in the waterway since the war began in February. That makes the incident a notable escalation in the current conflict.

Martin Kelly said Iran last used limpet mines against merchant shipping in May 2019. Four vessels anchored off Fujairah were attacked then. The following month, attacks struck the tankers KOKUKA COURAGEOUS and FRONT ALTAIR in the Gulf of Oman. The earlier incidents established a precedent for attaching explosives directly to commercial vessels.

The latest attack differs in location and timing but revives the same close-range danger. Kelly warned that vessels waiting at anchor could be especially vulnerable. The return of this method adds another layer to existing missile and drone threats, making detection and protection more difficult for commercial operators.

Ships are being kept moving through coordinated routing rather than simply abandoning the Strait of Hormuz. The United States continues coordinating commercial vessel movements, including along a southern route intended to maintain shipping despite Iranian threats. This approach seeks to organize traffic through a designated passage while reducing exposure to some dangers.

The southern route has not eliminated attacks. UKMTO’s October 30 overview recorded 81 projectile strikes since July 6, including 59 along that route. The United States’ coordination therefore provides a way to sustain movement, but it does not guarantee safety. Ships still face projectiles, small boats, mines, fires, and other maritime incidents.

Traffic has recovered gradually under these arrangements. UKMTO recorded 122 outbound and 155 inbound transits in its latest seven-day period. Yet total traffic remained about 70% below pre-conflict levels. Continued coordination, route monitoring, and verified incident reporting will remain important as threats evolve.

The article calls the Strait of Hormuz a strategic waterway and shows why its security matters. It is a narrow maritime gateway connecting the Persian Gulf with the Gulf of Oman and the wider Indian Ocean. Large volumes of oil and other commercial cargo move through this connection, so disruption can affect energy markets and international trade. This broader geographic context is established world knowledge; the article itself emphasizes the strait’s strategic role.

The reported tanker attack occurred as the vessel transited outbound from the strait. Other incidents included a projectile strike, a burning dhow, and Iranian claims involving tankers. Because ships use the strait to reach international waters, threats there can delay voyages, raise security risks, and discourage operators from sailing.

Commercial traffic is recovering, but remains about 70% below pre-conflict levels. The United States is coordinating movements through a southern route, while UKMTO tracks verified incidents. Continued attacks or new tactics could further reduce traffic and increase pressure on global energy and trade flows.