The Eiffel Tower active hydrothermal chimney is a major edifice investigated in deep-sea vent ecology at the Lucky Strike hydrothermal field (~ -1700 m), along the northern Mid-Atlantic Ridge (37.3°N, 32.3°W). This edifice, raising ~20 m over the surrounding seafloor, is associated with black smoker fluids flowing at >300°C as well as diffusion areas colonized by large Bathymodiolus azoricus mussel assemblages and microbial mats. This vent edifice was surveyed with vertical overlapping transects by ROV Victor6000 using an HD camera during the MoMARSAT2020 cruise. This dataset is part of a larger temporal series performed with other 3D reconstructions at the Eiffel Tower hydrothermal edifice that was used to investigate temporal dynamics of the edifice topography and the vent assemblages (Van Audenhaege et al. in prep.; see section "Note").

The Sintra hydrothermal vent site reconstructed in this dataset is 311.82 m². It is located in the North east of the main Lucky Strike Hydrothermal Vent Field (LSHF). The edifice has been surveyed with the remotely operated vehicle Victor6000 for inter-annual monitoring during the 2023 Momarsat cruise. Video transects were collected during dive 844-6 with a forward-looking camera and video sequences were used to build a 3D model of the edifice using structure-from-motion techniques. A first dataset includes 1561 images extracted every 2 seconds from the videos.  The images are time-stamped and linked to a navigation file, which is generated by interpolating navigation data at the corresponding timestamps. A second dataset includes a 3D textured model of the site (obj format) together with the a kml file for georeferencing. The ROV navigation file (.txt) is provided separately. Point :   37.2921244612 (lat) -32.2750499167 (long) -1612.34 (depth)

The Capelinhos hydrothermal vent site is a large edifice of 588 m² from its base. Located off axis, 1.5 km east of the central lava lake of the main Lucky Strike Hydrothermal Vent Field (mLSHVF), it is characterised by distinct geochemical and thermal conditions from the others mLSHVF edifices, with notably high iron concentrations compared to sites around the lava lake. The edifice has been surveyed with the remotely operated vehicle Victor6000 for inter-annual monitoring during the 2023 Momarsat cruise. Video transects were collected during dive 844-6 with a forward-looking camera and video sequences were used to build 3D models of the edifice using structure-from-motion techniques. A first dataset includes 2971 images extracted every 2 seconds from the videos.  The images are time-stamped and linked to a navigation file, which is generated by interpolating navigation data at the corresponding timestamps. A second dataset includes a 3D textured model of the site (obj format) together with the a kml file for georeferencing. The ROV navigation file (.txt) is provided separately. Point :   37.28948183 (lat) -32.26413676 (long) -1663.487 (depth)