DEEP has completed the installation of Vanguard, its pilot subsea human habitat, at Tennessee Reef in the Florida Keys National Marine Sanctuary. The system now sits 17 metres below the water’s surface following a complex marine operation, marking a significant milestone in subsea engineering and long-duration underwater research capability.The installation enables multi-day subsea missions, allowing crews of up to four aquanauts to live and work underwater for extended periods. These missions are designed to support marine science research, coral reef restoration, environmental monitoring, climate impact studies, and human performance research in extreme environments.With Vanguard now in place, the project moves into its next stage: commissioning, sea acceptance testing, and operational training ahead of initial crewed missions.
Underwater habitat system installed at 17-metre depth in Florida Keys
Vanguard was deployed through a staged marine operation involving the placement of an ocean floor foundation, securing the habitat structure onto it, and tethering a surface support buoy nearby to maintain operational connectivity.The complete system now rests on the sandy seabed at a depth of 17 metres (56 ft). The habitable module measures 10.7 metres in length and 2.5 metres in width, designed to support small teams living underwater for missions lasting five or more days.The deployment was carried out within the Florida Keys National Marine Sanctuary, a protected and scientifically significant marine environment where careful installation was required to minimise disturbance to the surrounding reef ecosystem.
Final testing phase begins for Vanguard underwater habitat system
With installation complete, Vanguard is now undergoing sea acceptance testing and commissioning, the final stages before formal operational use. These processes will assess system performance under real underwater conditions, including life-support systems, structural stability, communications, and pressure regulation.The habitat is also progressing toward DNV classification. DNV, a global leader in maritime certification, has been involved throughout the design and construction process, providing independent verification that the system meets established engineering and safety standards for subsea infrastructure.Following successful completion of this phase, DEEP will begin training support crews and aquanauts ahead of the first research missions at Tennessee Reef.
Vanguard advances DEEP’s vision for permanent underwater living infrastructure
According to DEEP, Vanguard represents a foundational step in a broader programme to establish long-term ocean infrastructure designed to support sustained human presence underwater. Norman Smith, Chief Technology Officer at DEEP, described the installation as a major milestone following 18 months of design, build, and testing work. He noted that the successful deployment brings the organisation closer to its goal of enabling continuous human activity in the ocean and expanding access to subsea environments for science and exploration.Eddie Kertis, superintendent of the Florida Keys National Marine Sanctuary, highlighted the importance of subsea habitats in supporting long-term research and improving understanding of marine ecosystems. He noted that the project builds on decades of scientific collaboration within the sanctuary.
Scientific and operational applications
Vanguard is expected to support a wide range of underwater research and operational activities, including coral reef restoration work involving extended monitoring and deployment of nursery-grown corals, as well as continuous reef condition assessments covering coral health, bleaching, disease, sedimentation, and environmental change. It will also enable long-duration ecosystem studies, including species surveys and food web analysis, alongside climate impact research focused on warming, acidification, and storm-related changes.In addition, the habitat will support human physiology and performance studies in isolated environments, development and testing of subsea sensors and sampling technologies, and training programmes for astronauts and teams operating in extreme conditions. Live educational outreach is also planned, allowing real-time communication from the seafloor to classrooms and public audiences.
Vanguard becomes first operational step in DEEP’s modular underwater habitat programme
Vanguard is positioned as the first operational step in DEEP’s wider vision for modular subsea habitats. Insights gathered from its deployment and early missions will inform the development of Sentinel, a larger next-generation system designed to expand capacity and duration of underwater living.For now, the habitat sits quietly on the seafloor of Tennessee Reef, connected to the surface by its support buoy, as preparations continue for the first crewed missions beneath the Florida Keys.