Iran’s seizure of two container ships using swarms of fast-attack craft near the Strait of Hormuz has shattered the notion that American naval superiority has neutralised Tehran’s maritime threat. Viewed from Washington, the operation exposes a significant gap in the assessment that Iran’s conventional navy had been largely destroyed. President Donald Trump acknowledged as much, conceding that the so-called mosquito fleet of speedboats was not previously considered a serious danger, while vowing to eliminate any vessel approaching a US blockade using the same “system of kill” deployed against drug smugglers in the Caribbean and Pacific. Yet the episode suggests that such kinetic deterrence may be ill-suited to the crowded, congested waters of the Gulf, where decisive identification and response times are compressed dramatically.

From London, analysts note a chilling echo of the 1980s Tanker War, when Iran retaliated against Iraqi attacks by targeting commercial shipping, and the United States responded by escorting reflagged Kuwaiti tankers through the strait. The strategic stakes today are arguably higher: roughly a fifth of the world’s traded oil and natural gas transits this chokepoint. But the operational environment has grown more complex. Iran’s paramilitary Revolutionary Guard now deploys what Greek maritime security firm Diaplous describes as a “layered system of threats” combining speedboats, shore-based anti-ship missiles, naval mines, drones, and electronic interference. This mix is designed to create uncertainty and slow decision-making among naval commanders, undermining any presumption of easy dominance.

Tehran, for its part, openly celebrates the tactic. Iran’s judiciary chief, Gholamhossein Mohseni Ejehi, pointed to the Guard’s speedboats and underwater drones as a demonstration of strength, framing the seizures as a deliberate message that the strait remains a contested space. The challenge for any future reopening of the waterway is not merely one of firepower but of tempo: fast-attack craft can appear without warning, strike, and disperse before larger warships can react. Forward-looking analysis in regional capitals suggests that the United States and its allies may need to revive escort-style convoys—this time with a doctrine that accounts for swarming, asymmetric threats rather than assuming that a single decisive engagement will restore freedom of navigation. The risk of miscalculation, meanwhile, remains acute, as both sides calibrate their rhetoric and force posture in a theatre where the margin between demonstration and escalation is measured in knots.