Scientific operations combining ROV and AUV in the Trondheim Fjord

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.