Sweden is testing 28 uncrewed aerial, surface and underwater systems at the REPMUS 2026 exercise in southern Portugal. They include an uncrewed Stridsbåt 90. About 300 people from the Swedish Armed Forces, industry and government agencies are taking part, according to the Swedish Armed Forces.
The systems are being tested in military scenarios with other NATO nations, the Swedish Armed Forces said. The scenarios cover the full chain from detection to engagement. Sweden, Finland, Denmark, Norway and Ukraine formed a joint task group playing the opposing force. The navy says the aim is better maritime surveillance, anti-submarine warfare and mine countermeasures.
"An uncrewed vessel is a complement to our larger crewed ships," said Lieutenant Commander Magnus Lind, a development officer at the Naval Staff.
Robert Sandgren, a technical officer at the Swedish Defence Materiel Administration (FMV), heads the Swedish participation. "The benefit is that we can combine military and industrial expertise in a way we couldn't otherwise," he said.
REPMUS runs from 31 August to 25 September. The Portuguese Navy organises it with NATO, the European Defence Agency and research partners. It says 36 navies, more than 1,500 personnel and over 300 unmanned maritime systems are involved.
Sweden first took part as a NATO member in 2024, as previously reported by NDS.