During a field expedition, students from the Geophysics course at the Federal University of Western Pará (Ufopa) successfully located two sunken vessels in the Tapajós River, specifically in the region between Santarém and Belterra, from March 9 to 13. The students utilized advanced geophysical equipment such as high-resolution seismic systems provided by the University of Brasília (UnB), alongside multibeam bathymetry technologies and side-scan sonar. This fieldwork involved approximately eight hours of daily navigation, which allowed the researchers to gather comprehensive information about the river's depth and underwater terrain.

The collected data enables the construction of 3D models of the studied area and detailed analysis of the subsurface. Initial findings indicate various geological features, including depressions in the riverbed, potential gas indications, and rocky outcrops, in addition to the identification of the two sunken vessels. These vessels have been identified as the "Rainha Ester" barge and its tugboat, which sank in November 2024. The importance of this discovery lies in both archaeological significance and the potential for further research on local hydrography.

Overall, this field activity highlights the practical application of academic learning and research in geophysics and enhances the understanding of underwater structures in the Tapajós River. The findings may also contribute to environmental monitoring and restoration efforts in the region as it provides valuable insights into the river's geological history, which is critical for understanding and preserving the local ecosystem.