Technical: When requested by owners, DNV GL may accept alternative survey methods for units in operation using (mini) Remote Operated Vehicles (ROVs) for ballast tank inspections on DNV GL-classed mobile offshore units in operation.
This technical update outlines the minimum requirements and conditions that must be met in order to accept the use of ROVs for ballast tank inspections. This includes the planning and preparation as well as conditions for acceptance and reporting. Notwithstanding DNV GL acceptance, it is emphasized that the method limits the possibilities to establish the “big picture” of the tank’s condition. Because of these limitations, this technical update concludes with restrictions which are to be applied...Read the full article in the PDF: