Ukraine unveils Sea Trident, a 10-tonne underwater strike drone, at Eurosatory
The Sea Trident extends Ukraine's unmanned naval campaign from surface drones to an extra-large autonomous submarine, pitched to Western buyers in Paris.
Global Mark's Sea Trident takes Ukraine's unmanned naval campaign underwater, a 10-tonne autonomous submarine pitched to Western buyers in Paris.
Ukrainian defense firm Global Mark unveiled the Sea Trident, a 10-tonne autonomous underwater drone, at the Eurosatory show in Paris on June 15, Militarnyi reported from the exhibition floor. The company builds aerial drones and electronic-warfare systems, and this is its first underwater vehicle shown in public.
Global Mark's stand listed a 10-meter steel hull, a 1,000-kilogram payload, a range of 2,000 nautical miles, an operating depth of 60 meters, and a top speed of 10 knots, per Militarnyi and the Kyiv Post. The figures are the manufacturer's and have not been independently verified.
Naval analyst H.I. Sutton, who catalogued it as the Sea Trident SL-1000, assessed an oval hull narrow enough to ride a truck inside a standard shipping container, and a contra-rotating propeller that suggests a fast terminal run. He placed it in the extra-large uncrewed underwater vehicle class, which few navies field.
Global Mark lists three jobs for the boat: strike, logistics, and intercepting other underwater drones. The last one fits a Black Sea now crowded with unmanned systems on both sides.
Ukraine's Magura V5 surface drone, carrying a roughly 320-kilogram warhead out to 800 kilometers, has damaged and sunk Russian Black Sea Fleet ships, the Kyiv Post noted, and the heavier Sea Baby came after it. Sea Trident moves that campaign below the surface and farther from shore.
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Frequently Asked Questions
What is the Sea Trident?
It is a 10-tonne autonomous underwater drone unveiled by Ukrainian firm Global Mark at the Eurosatory 2026 show in Paris, Militarnyi reported. Naval analyst H.I. Sutton labels it the Sea Trident SL-1000, an extra-large uncrewed underwater vehicle.
What are its stated specifications?
Global Mark's presented figures, reported by Militarnyi and the Kyiv Post, are a 10-meter steel hull, a 1,000-kilogram payload, a range of 2,000 nautical miles, an operating depth of 60 meters, and a top speed of 10 knots. The figures are the manufacturer's and are not independently verified.
What missions is it built for?
According to Militarnyi and the Kyiv Post, Global Mark lists strike operations against strategic targets, logistics and cargo delivery, and intercepting and neutralizing other unmanned underwater vehicles.
How does it fit Ukraine's naval drone effort?
The Kyiv Post noted that Ukraine's Magura V5 surface drone has damaged and sunk Russian Black Sea Fleet ships, and the larger Sea Baby followed. Sea Trident extends that unmanned campaign from the surface to an underwater platform with longer reach.
Is the Sea Trident in service yet?
It was shown as a product at Eurosatory, not confirmed in operational use. H.I. Sutton notes it is the company's first publicly revealed underwater drone, and the presented capabilities remain manufacturer claims.
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Marcus Schuler
Marcus Schuler edits BattlePolicy, a daily defense-technology brief connecting the companies and capabilities behind modern war to the contest among Europe, the US, Russia, and China.