VISIR-1.b is a Matlab-coded routing model for computing optimal and safe ship tracks by means of a graph-search method. The model accounts for both waves and ocean currents. Both static (bathymetry, shoreline) and dynamic safety constraints (vessel intact stability) are considered. This code release is organised into a "production code", employed for computing least-time tracks, and a "post-processing suite", for assessing the energy efficiency gains of the optimal tracks with respect to least-distance tracks. Please refer to the ReadMe.txt for further information and code installation procedure.

VISIR-1.b model documentation and results are provided in the manuscript: Mannarini, G. and Carelli, L.: VISIR-1.b: ocean surface gravity waves and currents for energy-efficient navigation, Geosci. Model Dev., 12, 3449–3480, (2019) https://doi.org/10.5194/gmd-12-3449-2019

Input data availability: patches for code bugs: https:doi.org/10.5281/zenodo.10213873 Additional datasets relative to figures in the manuscript: https://doi.org/10.5281/zenodo.2556801