From signed order to a vehicle in the water took under 12 months, by Saab’s count. The Swedish company says it, the Swedish Defence Materiel Administration (FMV) and the Swedish Armed Forces developed, built and launched a demonstrator for a Large Uncrewed Underwater Vehicle, or LUUV, in that time. The demonstrator has finished sea trials, and with them the project’s first phase.
That pace is the story. The build speed is the one hard number Saab has published, and it comes with a vehicle that has already been to sea rather than a drawing or a promise.
Saab announced the milestone in an Oct. 16, 2026 press release. It says that “Less than one year after contract award,” the three partners “have successfully developed, built and launched a demonstrator” for the LUUV. “Following successful sea trials, the first phase of the project has been completed,” the release says.
What the demonstrator is for
The release describes a test vehicle, not a finished weapon. Saab says the demonstrator “has been developed to support the development and evaluation of future underwater capabilities,” and to enable operations alongside existing naval platforms, “such as submarines.”
The company credits its speed to software. According to the release, the rapid development was enabled by Saab’s software-centric approach and the integration of “Autonomous Ocean Core, Saab’s autonomous control system that provides surface and subsurface vehicles” with autonomous capabilities. Saab also points to Swedish expertise in submarine design and sensor integration.
Mats Wicksell, head of Saab’s business area Naval, framed the result in practical terms.
“This project demonstrates how new technologies can be rapidly translated into practical operational value.”
Wicksell said the vehicle “can contribute to increased endurance, enhanced situational awareness” and strengthened underwater capabilities, and that developing and testing it in such a short timeframe “demonstrates the strength of the collaboration between the Swedish Armed Forces, FMV and Saab.”
The contract behind the clock
The order itself was modest. In an Aug. 29, 2025 announcement, Saab said it had received the FMV contract and that “The order value amounts to SEK 60 million.” That release named Saab as prime contractor, “responsible for the design, construction, and testing of the vehicle,” in a project led by FMV.
The 2025 release also set the boundaries. It called the LUUV “a sensor platform developed to have various capabilities” and said it “will not be designed to carry weapons in the first phase.” It gave the reason for the work in one line: “The need to monitor and map the seabed infrastructure and to detect and deter threats beneath the surface is significant.” The same release said, “The first sea trials are planned for the summer of 2026.”
Neither Saab release gives the date or place of the launch or the sea trials. The 2026 release does not name the contract date, and Saab’s August 2025 announcement came about 13 and a half months before the Oct. 16, 2026 release. Saab’s “less than one year” describes the development, build and launch, not the date of the announcement.
Size, range and the questions FMV asked
Saab’s 2026 release gives no dimensions. Naval News, in a March 15, 2026 report by Richard Scott, identified the demonstrator as the Autonomous Ocean Drone and gave its baseline intelligence, surveillance and reconnaissance configuration as 7 meters long, 1.4 meters in diameter and 6.5 tonnes. The outlet reported a range of more than 600 nautical miles at a patrol speed of around 4 knots. Those figures come from that report, not from Saab’s release.
The same report quoted Rear Adm. Fredrik Lindén, FMV’s director of naval systems, on what the government buyer wanted to learn: “Can we pick up the production pace and get it in the water in the right time?”
Phase two
The next stage moves from hull to brains. Saab says the results will support the continued development of software, sensors and autonomous functions, and will feed future product development.
The release also says the project “provides a basis for Swedish authorities’ decisions regarding the future acquisition” and operational use of autonomous underwater systems. That decision, not the demonstrator, is what will tell whether Sweden buys large underwater drones in numbers.
Top image: The Swedish submarine HMS Gotland in 2007, a Kockums-built boat. Saab’s LUUV demonstrator not shown. Image Credit: U.S. Navy — Public domain / Wikimedia Commons