At least two of Thursday's six maritime attacks used explosive-laden unmanned surface vessels — drone boats — the first time Iran's IRGC Navy has deployed a weapon it previously supplied only to proxy forces. The Houthis used Iranian-made drone boats against Saudi Coalition vessels in the Red Sea as early as 2016, when one struck the Emirati logistics catamaran HSV-2 Swift near the Bab el-Mandeb strait. Iran provided the technology and the engineering; its proxies took the operational risk. That division has now collapsed. The IRGC is using the weapon itself, in its own waters, against commercial shipping.
Drone boats are small, low-profile, and difficult to detect on radar. They operate in shallow coastal waters — precisely the conditions of the strait of Hormuz, where the navigable channel narrows to 21 nautical miles and large warships are constrained in their ability to manoeuvre. Unlike anti-ship missiles, which can be tracked on approach and engaged by shipboard defence systems such as Phalanx CIWS or SeaRAM, a drone boat approaching at wave height among legitimate fishing dhows and coastal traffic produces a targeting problem that existing naval defences were not built for. The Gulf is one of the most congested waterways on earth. Distinguishing a threat from a fishing boat at two nautical miles, in time to engage, is an operational challenge no navy has solved at scale.
The deployment follows a visible pattern. As CENTCOM struck missile launchers, naval vessels, and the IRGC's aerospace and drone headquarters in Tehran , conventional fire initially dropped. CENTCOM cited this as evidence of destruction. By Day 8, 109 drones and 9 ballistic missiles struck UAE targets in a single day , answering whether reduced fire reflected destroyed or merely dispersed capacity. The drone boat is the next step in that asymmetric adaptation: a weapon that is cheap to produce, requires no fixed launch infrastructure that air strikes can neutralise, and is effective against the commercial shipping the IRGC's absolute Hormuz blockade declaration is designed to stop.
The economics are unambiguous. A drone boat costs tens of thousands of dollars. The tankers it targets carry cargo worth hundreds of millions. The warships that would need to defend against it cost billions per hull. Every drone boat that forces a tanker to divert or an insurer to withdraw coverage achieves the same strategic effect as a far more expensive Ballistic missile — at a fraction of the cost and with no launch signature for satellites to detect in advance.
