Ukraine’s family of unmanned surface vessels (USVs) continues to grow as the Security Service of Ukraine (SBU) have developed a Grad rocket-armed Sea Baby drone. The one-way or kamikaze USVs deployed by Ukraine in the Black Sea have been instrumental in engaging the Russian Navy, however, more recently new variants have emerged as Russia has begun to adapt and successfully engage the Sea Babies which in turn has seen the Ukrainians seek to adapt.

The first video of the rocket-armed USV in action recently emerged and the SBU has released some photographs which appear to show the drone in testing. On 22 May, an anonymous SBU source told The Kyiv Independent that the new drones have been used in combat “against Russian positions on the Kinburn spit,” a stretch of often fought over land on the coast near Mykolaiv. “This technological solution is already showing powerful results,” with the source adding “Our Sea Baby is not just a drone, but a multifunctional platform that is constantly being improved.” So far it seems the rocket-armed USV has been used against shore targets rather than to engage the Russian Black Sea Fleet, firing on a moving target from an unstable platform may be much more of a challenge. It remains to be seen if this USV variant has been put to use engaging vessels at sea. The Grad Sea Baby gives the SBU the useful ability to strike shore targets anywhere along the Russian-occupied Black Sea coast. From available imagery, at least three of the rocket-armed variants have been built.

The drones have been equipped with six 122mm Grad rocket launch tubes. The BM-21 multiple rocket launch system is used by both Ukraine and Russia. It’s size, ubiquity and relative cheapness makes it an obvious choice for mounting on the six meter long Sea Baby. The latest versions of the Sea Baby are reportedly able to carry 400 kg warheads over 500 miles at speeds of up to 48 knots.

The Grad rockets have a range of anywhere between 20 and 50 km depending on the type of rocket used. It’s unclear if a sea-based launch impacts the rocket’s range or accuracy but depending on sea conditions dispersion of the munitions is almost certainly affected. While accuracy may be impacted the rockets still give the Sea Baby a useful stand off capability, allowing the USVs to engage targets at a distance rather than having to make it physically all the way to the target to detonate its payload. How the rockets are aimed or the launcher is zeroed isn’t yet clear. The tubes do not appear to be adjustable for elevation as photos appear to show them fixed in place at a slight angle. Available photos show the launcher being tested ashore at a range, perhaps the tubes are bore sighted.

This isn’t the first time rockets have been fired from a Ukrainian USV, back in January 2024, footage of a USV firing smaller rockets at a Russian patrol vessel emerged. The rockets are believed to be RPV-16 or RPO-A thermobaric rockets. Some of this footage, along with other older video, was included in a short clip which showed off the rocket-armed Sea Babies. While this footage may not show a Grad launch Vasyl Malyuk, head of the SBU, has said during a press event with UNITED24, that “For the first time, the SBU used the “Sea baby” drone, equipped with the “Grad” rocket salvo fire systems, in December 2023,” adding that this represented a “new milestone in the history of sea battles.” Newsweek reported that the Sea Babies fitted with Grad launchers were paid for using United24 donations, with each USV estimated to be worth $221,000.

Most recently we also saw another curious Ukrainian USV emerge, equipped with an improvised air-defense system with two repurposed AA-11 ARCHER (R-73) air to air missiles. The air defense USV emerged as Russian helicopters began to effectively engage the Ukrainian USVs. Given the rapid evolution of Ukraine’s USVs it would not be surprising to eventually see one equipped with an anti-ship missile, such as a small RBS-17.

The small cross section and speed of the Sea Baby drones allow them to infiltrate and approach Russian Black Sea vessels both at sea and in port. However, Russia has developed rudimentary tactics for successfully engaging them either with helicopters or with small arms and other defensive fire from vessels. A stand off capability, be it a USV equipped with unguided Grad rockets or an anti-ship missile, adds another dimension the Russians will have to adapt to. The Grad-armed Sea Baby is the latest indicator that Ukraine’s USV fleet is continuing to diversify to meet new threats and operational requirements.

An earlier version of this article first appeared at OvertDefense.com.

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