Direct proof of use
Explosive unmanned surface vessels were documented in the 2014 Yemen Civil War as Houthi maritime attack craft against Saudi-led coalition and shipping targets. The clearest early case was the 30 January 2017 attack on the Royal Saudi Navy frigate Al Madinah near Hudaydah: USNI News reported that the U.S. Navy assessed the attacking craft as an unmanned, remote-controlled boat, while the U.S. Maritime Administration described the same incident as a waterborne improvised explosive device attack against a Saudi frigate in the southern Red Sea.
Conflict Armament Research separately described its analysis as a waterborne improvised explosive device deployed by Houthi forces in Yemen. IISS later summarized the conflict pattern, stating that the Houthis first deployed explosives-laden USVs in the Yemeni conflict in 2017 with the Al Madinah attack and then used USVs sporadically against Saudi-led-coalition warships, merchant vessels linked to coalition states, and Saudi Red Sea ports.
Sources: USNI Al Madinah Unmanned Boat, MARAD Southern Red Sea WBIED Alert, Conflict Armament Research Drone Boat, IISS Navigating Troubled Waters
Timeline
On 30 January 2017, a small explosive craft struck Al Madinah off Yemen's Red Sea coast. MARAD issued a shipping alert for the southern Red Sea near Hudaydah, and USNI News reported that the attack killed two Saudi sailors.
By 2018, Conflict Armament Research had published technical analysis of a Houthi-deployed waterborne improvised explosive device, documenting the weapon category as a Houthi system in Yemen rather than only a general maritime hazard. IISS later described subsequent Houthi USV employment in the Yemen conflict as sporadic and aimed at coalition warships, merchant vessels linked to coalition states, and Saudi Red Sea ports.
On 5 March 2024, U.S. Central Command reported that its forces destroyed three unmanned surface vessels located in Houthi-controlled areas of Yemen, after earlier Houthi launches toward USS Carney and Red Sea shipping lanes the same day. That incident shows the weapon category remained part of the Houthi maritime threat from Yemen during the later phase of the civil war.
Sources: USNI Al Madinah Unmanned Boat, MARAD Southern Red Sea WBIED Alert, Conflict Armament Research Drone Boat, IISS Navigating Troubled Waters, March 5 CENTCOM Update
Narrative
In the Yemen Civil War, the Houthi explosive USV role was maritime strike and sea denial. The weapon appeared in public evidence as a bomb-carrying or WBIED-style surface craft used against ships near the Red Sea approaches to Yemen, especially around Hudaydah and the Saudi-led coalition's maritime operating area.
The documented targets distinguish the Yemen Civil War record from simple possession or display. The Al Madinah case was a successful strike on a Saudi-led coalition warship, and IISS describes later Houthi USV use against coalition warships, merchant vessels linked to coalition states, and Saudi Red Sea ports. CENTCOM's March 2024 report documented Houthi-controlled Yemen as the operating area for USVs assessed as imminent threats to merchant vessels and U.S. Navy ships.
Public sources do not consistently identify named Houthi USV models for every Yemen Civil War incident. This page therefore treats the catalog item as an explosive Houthi USV category, including waterborne improvised explosive devices and explosive-laden drone boats where the source directly connects the craft to Houthi use in Yemen.
Sources: USNI Al Madinah Unmanned Boat, IISS Navigating Troubled Waters, March 5 CENTCOM Update
