In the last week of October 2025, as part of the BCThubs project our partners from 3D Research carried out a field validation campaign and were our guest here in Sozopol. This mission was one of the project’s ongoing commitments to testing and showcasing innovative technologies that help document, protect, and reimagine our shared Underwater Cultural Heritage.
Underwater Photogrammetry with ROV
The first demonstration focused on a high-precision 3D survey of the stone forest in Sozopol, using a remotely operated vehicle (ROV) equipped with a custom multi-camera photogrammetric system. This setup combines a stereo camera with a high-resolution imaging sensor, enabling simultaneous capture of both detailed geometry and fine textures. Even though the weather conditions were very bad as you can see in the photos, the team of 3D Research managed to present us with the capabilities of their ROV.
Augmented Diving Experience
The second demonstration introduced a revolutionary concept for underwater exploration. The team presented an underwater tablet system capable of acoustic communication and localization, allowing divers to exchange messages, view their position in real time and access rich multimedia content about the site – all while submerged. This technology aims to create a future where diving becomes not only an adventure, but a fully interactive, educational experience.
For this phase of testing, two archaeological locations were selected:
- breakwater made of piled stones in Sozopol
- we decided to also test the tablets for documenting the vertically driven wooden posts and horizontally placed wooden beams part of the prehistoric settlement in the waters of the Old Fishing Harbour in Sozopol – an ongoing project that we’re working on right now
This work successfully showcased how emerging technologies can enhance both scientific investigation and public engagement in underwater cultural heritage. By combining robotics, digital mapping, and acoustic communication, the BCThubs project continues to bridge past and future — making Europe’s submerged heritage more accessible, understandable, and alive than ever before.
