Sea Trident SL-1000: New Ukrainian Underwater Drone (UUV)

The Sea Trident SL-1000 is an extra-large uncrewed underwater vehicle (XLUUV) built by Ukrainian firm Global Mark. The company is already associated with a range of aerial drones (UAVs) and electromagnetic warfare (EW) systems, but this is its first publicly revealed underwater drone.

The Sea Trident SL-1000 is being shown at the Eurosatory 2026 defence exhibition in Paris. Reports indicate that it is intended for strike as well as logistics and neutralizing other underwater vehicles. The steel hull is unusual in that it is oval, being wider than it is tall, although a folding mast assembly is added on the back. Its overall size is small enough to be road mobile inside a standard ISO shipping container.

Specifications
Length: 10 meters
Beam: 2 meters
Height: 1.5 m (likely without mast assembly)
Weight: 10 tonnes
Range: 1,700 nautical miles
Speed: 6 knots cruising, 10 knots max.
Operating depth: 60 meters
Payload (warhead): 1,000 kg

The SL-1000 on display at Eurosatory-2026. Photo from militarnyi.com

The vehicle has an unusual contra-rotating screw (propeller) with a 6-blade screw spinning anti-clockwise in front and a 5-blade clockwise one behind. This implies a high maximum speed, possibly during the terminal phase of an attack. There are no discernable control surfaces but there are visible thrusters for attitude correction, and possibly position keeping.

The SL-1000 on display at Eurosatory-2026. Photo from militarnyi.com

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