US military used autonomous explosive drone boats in combat for the first time, adopting kamikaze tactics pioneered by Houthis and Ukraine

The US Military Just Used Autonomous Explosive Drone Boats in Combat

On the night of July 12, three American surface drones navigated toward an Iranian midget submarine and ship maintenance facility at Bandar Abbas Naval Base. They made what USNI News described as a "low-speed, uncontested approach." Then they detonated. 1

US Central Command confirmed the strike in a social media post, calling it the "first time American forces have employed sea drones in combat operations." 2 The vessels were Saronic Corsair autonomous surface vessels, built by Saronic Technologies, a defense company based in Austin, Texas. 3

Here is the so what: the United States military just adopted the asymmetric warfare doctrine of its adversaries.

For nearly a decade, exploding drone boats have been the weapon of groups that cannot afford a conventional navy. The first confirmed use came on January 30, 2017, when Yemen's Houthi faction struck the Royal Saudi Naval frigate Al Madinah with an uncrewed remote-controlled boat, likely developed with Iranian technical assistance. 4 Since Russia's full-scale invasion in February 2022, Ukraine has built an entire naval strategy around drone boats despite having no conventional fleet, striking Russian warships, forcing the Black Sea Fleet to withdraw from forward bases, shooting down helicopters with missiles mounted on uncrewed surface platforms, and even deploying an armed ground robot onto contested coastal territory. 1

Now the United States is running the same playbook.

Each Corsair measures 24 feet and can carry up to 1,000 pounds over 1,000 nautical miles at a top speed of 35+ knots, according to specifications from Saronic. 5 The company describes the vessel as capable of operating autonomously without direct human control, including long-range navigation, patrol missions, and regulating power consumption to loiter at a specific position. Ars Technica reported that the vessels were likely equipped with explosives for this specific strike. 1

The cost calculus is not subtle. The US military is working to procure a new generation of cheaper surveillance and strike drones after losing dozens of MQ-9 Reaper drones collectively worth roughly $1 billion during the war with Iran. 1 A 24-foot autonomous boat that can travel 1,000 nautical miles and detonate a 1,000-pound payload costs a fraction of a manned strike sortie or a guided missile. The Pentagon is not merely tolerating expendable weapons. It is building a procurement strategy around them.

The drone boat strikes came as part of a broader US military offensive against Iranian targets that included strikes by US fighter aircraft and warships. 1 This was the second notable use of a Corsair in the conflict. The US military previously deployed one to rescue two Army helicopter pilots whose AH-64 Apache was shot down by an Iranian Shahed drone off the coast of Oman on June 8. 1

But the deeper question is about autonomy and accountability.

The Corsair's onboard systems handle long-range navigation, patrol, and loitering on their own, per the manufacturer's description. Whether a human operator designated the final impact point or the vessel's software guided the terminal approach has not been publicly disclosed. The distinction matters. The autonomous weapons debate has focused almost entirely on aerial drones and ground robots, where the concern is software selecting and engaging targets without human judgment. The sea domain has been largely absent from that conversation.

Then there is the procurement layer. The vessels that struck Bandar Abbas were designed and built by Saronic Technologies, a private defense company. The hardware that delivered explosive payloads to an Iranian naval base, and the autonomous navigation systems aboard it, come from a private manufacturer rather than a government arsenal. As autonomous weapons proliferate, the relationship between private companies and lethal decision-making is becoming harder to define.

The US military just used autonomous explosive drone boats in combat for the first time. It borrowed tactics from the Houthis and Ukrainians. It used hardware built by a private company. And it did so with almost no public discussion about what it means when a 1,000-pound payload can be delivered by a vessel that navigates 1,000 nautical miles on its own.