// Extra-Large Underwater Drone
Sea Trident ST-1000
- Manufacturer
- Global Mark
- Status
- In trials
Key specifications
- 10 m long, about 10 t, with a 1,000 kg payload
- Up to 2,000 nautical miles at 6 knots; 10 knots top speed
- Operating depth 60 m; fits a standard ISO shipping container
Sea Trident ST-1000 / Global Mark
Overview
Global Mark is a Ukrainian company previously known for aerial drones and electronic-warfare systems. In June 2026, at Eurosatory in Paris, it unveiled the Sea Trident ST-1000, which EDR Magazine describes as the first Ukrainian extra-large uncrewed underwater vehicle shown at an international exhibition. The autonomous vehicle is 10 m long, weighs about 10 t and carries up to 1,000 kg. According to the company, it can travel up to 2,000 nautical miles at a cruising speed of 6 knots, with a top speed of 10 knots and an operating depth of 60 m. Shrouded counter-rotating propellers are meant to reduce its noise. The company describes three roles: strikes on distant targets, cargo delivery and intercepting enemy underwater drones. The vehicle fits in a standard ISO shipping container for road transport. At the time of the show it was in the final stage of testing.
Sources
- Militarnyi, 15 Jun 2026
- EDR Magazine, 23 Jun 2026
- Naval News, 26 Jun 2026
Public figures as reported by the company and the press, with dates. Independent verification is part of our vetting process and is shared with counterparties under NDA.
