By applying an underwater hyperspectral imager (UHI) to a selection of archaeological artifacts, we have found spectral signatures that are representative of materials likely to be present at wreck sites. By successfully using the signatures to classify a subset of said artifacts placed on the seabed at 61 m depth, we demonstrate that it is possible to detect archaeological objects of interest in UHI data acquired by a remotely operated vehicle. Correct UHI classification of rust and glass bottles in situ on a historical wreck site further supports the viability of the method for marine archaeological applications.

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This paper will show how AUV and ROV can complement each other in a scientific mapping campaign in the Trondheim Fjord. To complete this survey, a multidisciplinary approach was necessary to adapt the industrial and military technology to identify and map object of interest (OOI) on the seafloor. NTNU AUR-Lab and FFI mobilized for a collaborative cruise with ROV Minerva equipped with: video camera, dynamic positioning system, still camera for photo mosaic, UHI (Underwater Hyper spectral Imager), MRU and MBE and the AUV Hugin HUS with synthetic aperture side scan sonar and still camera as main instruments. These platforms complemented each other; the AUV had an unprecedented area capacity for mapping and search, while the ROV provided detailed information of the site.

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