Ship attacks surge in Hormuz

What's happened

Maritime groups have logged a sharp rise in attacks on commercial vessels transiting the Strait of Hormuz in October. Security firms and UKMTO report dozens of strikes, including hits to engine rooms and a ship struck by an RPG, forcing some vessels to be disabled or sink and slowing recent recovery in Gulf oil flows.

What's behind the headline?

What is happening

Commercial shipping through the Strait of Hormuz has been under concentrated attack since February, and incidents have accelerated in October. Maritime agencies and security firms have recorded repeated strikes, including direct hits to engine rooms that knock vessels out of service and attacks using projectiles and drones.

Who is driving the attacks

Iran and Iran-aligned groups, including the Islamic Revolutionary Guard Corps and proxies, are carrying out operations to control transit lanes. They are acting because US-led escorts and increased tanker traffic have pushed more oil shipments close to pre-war volumes, giving Tehran a lever to raise costs and disrupt flows.

Immediate operational impact

• Direct engine-room hits will take some ships out of service for months and force costly repairs.
• Several vessels have been disabled, one has sunk, and crew casualties and missing seafarers have been reported.
• Shipowners are already facing sharply higher tanker fees and insurance premiums; those costs will continue to rise.

Market and logistical consequences

• The recovery in Gulf crude shipments that occurred in September has stalled and will remain fragile while attacks continue.
• Shippers are using escorted shuttle routes and transshipment in the Gulf of Oman; these work but increase costs and complicate logistics.
• Brent and other benchmarks will remain volatile because the attacks will constrain supply routes and raise risk premia.

What comes next

• Military escorts and coordinated protection will continue to move more ships through the waterway, but escorts will not eliminate risk; Tehran will keep targeting vessels beyond the immediate strait to demonstrate reach.
• Expect sustained disruptions to flows and higher freight and insurance costs; the insurance and charter market will force some cargoes onto longer, more expensive routes, increasing delivery times and energy costs.

Bottom line

The attacks will keep shipping risk elevated and will force sustained increases in transport costs and insurance. Energy flows will stay below pre-war volumes until either attacks decrease or a durable security solution emerges.

How we got here

The attacks began in March after the US-Israel war with Iran started in late February. Iran-aligned forces and the IRGC have targeted vessels they say use unauthorised routes, disrupting a waterway that carried about a fifth of global oil before the conflict and prompting military escorts and shuttle systems.

Our analysis

Bloomberg highlights the technical severity of recent strikes, noting that "at least 23 incidents" were logged in the first two weeks of October and that "at least five" reported impacts to their engine rooms, which "can cause fires and leave ships without power or propulsion." That detail underscores why industry sources warn repairs can take months. Al Jazeera, reporting on UKMTO briefings, quotes the maritime organisation saying it is "struggling to accurately report true number of attacks with majority of vessels attacked refusing to report to UKMTO," and cites a new reported attack where a tanker master said their vessel was hit by an RPG 78 nautical miles northeast of Jubail. That account stresses under-reporting and an expanding geography of strikes. BBC Business assembled UKMTO reports into a timeline and emphasised human cost: footage and agent reports showed the tanker Petro Dolphin on fire and two crew missing, while the container ship GFS Pride sank after a strike. The BBC also used Kpler flow data to show shipments slipped from about 15 million barrels per day late September to roughly 12.6 million bpd by Oct 13. CNBC and other maritime analysts cited the IMO and JMIC to quantify casualties and weekly attack totals, and quoted analysts saying Washington-led escorts have increased volumes but that "volumes are getting through at a time of extremely high maritime risk." CNBC also reported injuries aboard the tanker On Peace. Across these accounts the consistent threads are rising incident counts, direct engine-room damage (Bloomberg), under-reporting and new weapon types (Al Jazeera), visible ship losses and crew casualties (BBC), and continuing market effects on flows and insurance (CNBC, Bloomberg).

Go deeper

• How are insurers and shipowners changing routes and cover after the October spike?
• What new defensive measures are regional navies and escorts adopting to protect transits?

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