Advanced Navigation, a leader in navigation and autonomous systems, in collaboration with marine consultancy O2 Marine, has revealed an explicit visual depiction of Hall Bank, a small, nearshore reef off Fremantle in
Advanced Navigation, a leader in navigation and autonomous systems, in collaboration with marine consultancy O2 Marine, has revealed an explicit visual depiction of Hall Bank, a small, nearshore reef off Fremantle in south-west Australia (32°S), located well beyond the typical latitudinal range for coral reefs.
Using Hydrus, a micro hovering autonomous underwater vehicle (AUV), the teams conducted a detailed survey of the reef, capturing geo-referenced high-resolution imagery and 4K video in parallel. The data showed severe coral bleaching and fragmentation, laying bare a hidden yet escalating crisis at one of the world's southernmost reefs.
The mission involved the simultaneous deployment of three Hydrus units, each executing coordinated transects and lawnmower survey patterns across different sections of the reef.
This approach enabled comprehensive spatial coverage, ensuring overlapping, high-resolution data capture across the site. By flying precise, parallel tracks, Hydrus was able to systematically map the reef’s structure and condition, capturing the fine-scale changes in coral health that are often missed by traditional survey methods.
The data gathered from Hydrus was used to generate a 3D digital twin of the Hall Bank seabed. The model revealed a barren seafloor filled with pale, lifeless corals, documenting the shrinking coral formations.
3D digital twin of
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