Underwater drone Sea Trident: Ukraine's Global Mark shows the “future” of the Crimean Bridge

A new underwater drone from Ukraine was on display at the Eurosatory 2026 defence exhibition in Paris: the company Global Mark presented the Sea Trident there, an unmanned underwater vehicle (USV/UUV). In future, it could play an important role in strategic operations in the Black Sea. The system combines long range, high payload and the capability for autonomous operation in a single platform.

The Sea Trident weighs around ten tonnes, has a range of up to 2,000 nautical miles (around 3,700 kilometres) and can carry a payload of up to 1,000 kilograms. It is therefore designed for a broad spectrum of tasks: strikes on high-value maritime and infrastructure targets, engaging enemy underwater drones, reconnaissance missions and logistics operations.

Submerged, the drone travels at up to 10 knots (18.5 km/h); its maximum operating depth is 60 metres. A low signature and modern navigation systems are intended to enable autonomous operation even over long distances.

Underwater drone for strike and logistics

Notably, military striking power and logistical flexibility are combined here. The Sea Trident can not only carry out conventional strike missions but also deliver materiel, equipment or supplies to hard-to-reach areas.

Given Ukrainian attacks on Russian naval units and critical infrastructure in the Black Sea, interest is likely to focus above all on covert operations against strategic targets. Because long range and a heavy explosive payload come together, there is also speculation as to whether the system could in future be used against particularly well-protected infrastructure projects.

With the Sea Trident, Ukraine once again underlines its role as a driver of innovation in unmanned systems. At the same time, it is clear that the technological race has long ceased to be fought only above the water's surface, but increasingly below it as well.