Quantum Systems is expanding into the maritime domain, connecting autonomous operations above and below the waterline with its existing capabilities in the air and on land. With the launch, the company introduces Seavex and Subvex, its first two maritime systems designed for persistent surveillance, critical infrastructure protection and Counter-UAS operations.
Sesimbra, Portugal, 14 September 2026 – Quantum Systems today announced the launch of its maritime domain, expanding its unmanned systems portfolio from air and land to sea.
The launch takes place in Portugal on the sidelines of a major NATO maritime exercise and introduces two new systems, Seavex and Subvex. Both systems will test and validate capabilities as part of sea trials, extending Quantum Systems’ autonomous capabilities above and below the waterline in an operational environment.
Seavex and Subvex are fully integrated into MOSAIC UXS, enabling their deployment alongside unmanned air and ground systems through a common software architecture. The result is an interoperable system across air, land and sea that can be expanded with additional platforms, sensors and third-party technologies.
“We started in the air, expanded to land, and now we are going to sea. But the real step forward is not adding another domain. It is connecting them,” said Florian Seibel, Co-CEO and Founder of Quantum Systems. “With Seavex and Subvex integrated into MOSAIC UXS, we are building one autonomous system across air, land and sea. That is where unmanned operations are heading, and that is what we are delivering.”
Seavex and Subvex: autonomous capabilities on the water and below the surface
Seavex is a long-endurance unmanned surface vehicle (USV) designed for persistent maritime ISR missions. With an endurance of up to two months, the system includes surveillance radar, counter-drone radar and electro-optical sensors with onboard AI processing. Seavex launches and recovers UAVs while docking, recharging and retrieving mission data from UUVs.
Subvex is an AI-enabled unmanned underwater vehicle (UUV) designed for autonomous ISR missions at depths of up to 6,000 metres. Equipped with sonar and acoustic sensors as well as onboard edge processing, the system can operate for up to four days in active movement and supports distributed operations with multiple Subvex vehicles. It can also remain on the seabed in passive surveillance mode for persistent underwater monitoring for weeks.
Together, both systems extend reconnaissance from the surface into the deep sea and support missions including the protection of critical maritime infrastructure, maritime border security, anti-submarine surveillance and blue-water surveillance. Their integration into MOSAIC UXS enables sensor information from different systems and domains to be combined within a single operational environment.
The expansion comes as maritime security is gaining strategic importance, with coastlines, ports and critical marine infrastructure facing a growing need for persistent surveillance. At the same time, threats increasingly span the air, surface and underwater environment, requiring information from across the waterline to be detected, connected and understood as part of one operational picture.
“Maritime operations have a fundamental challenge: the areas are vast, while crews and assets are limited,” said Dirk Zademack, VP Quantum Maritime at Quantum Systems. “In the air and on land, we have built an ecosystem in which unmanned systems operate together rather than individually. We are now applying the same principle at sea with Seavex and Subvex: extending collaborative presence on the water and below the surface and compiling the information for the operator.”
The launch marks the next step in Quantum Systems’ consistent expansion as a global deep-tech defence prime. The company has expanded beyond aerial systems into a broader portfolio of unmanned capabilities, while building the software, AI and system integration expertise to connect them. With MOSAIC UXS as the common software backbone, Quantum Systems brings these capabilities together into an integrated, scalable system.
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About Quantum Systems
Quantum Systems is a leading European defence neo-prime built on deep technology. The company develops, manufactures and deploys battle-proven autonomous systems for defence, security and civil resilience customers. Its portfolio brings together hardware, software and AI across unmanned systems, sensors and counter-UXS solutions for air, land, sea and adjacent domains. MOSAIC UXS, its AI-enabled mission combat system, connects these capabilities into an interoperable operational network, enabling forces to sense, decide and act faster. With more than 1,700 employees across eight countries, Quantum Systems combines fast-growing revenue and demonstrated profitability with the industrial base to scale across allied markets.