Abstract VIVANA is a computer program for evaluation and analysis of vortex induced vibrations in slender marine structures. The analysis may include: cross-flow loading in-line loading or both cross-flow and in-line loading VIVANA has been developed by: MARINTEK Division of Structural Engineering and Division of Offshore Hydrodynamics. NTNU Department of Marine Technology. This document gives a detailed description of all input data needed to run VIVANA.