This code release introduces new functionalities and fixes a bug. In particular: clearer inline comments in the input namelists enhanced GUI (based on streamlit) for port code search updated user manual bug fix(*) for case of input fields with overlapping timespans bug fix(*) relative to marine fields pre-processing in certain costal regions *) already published results are unaffected.

Source code of the VISIR-2 ship weather routing model. The Python-coded VISIR-2 model considers currents, waves, and wind to optimise ship routes via a graph-search method. It computes least-distance, least-time, and least-CO2 routes in a dynamic marine environment. The model was validated, and its computational performance is quasi-linear. 

This version of the VISIR-2 source code reproduces the results documented in the paper: Mannarini, G., Salinas, M. L., Carelli, L., Petacco, N., and Orović, J.: VISIR-2: ship weather routing in Python, Geosci. Model Dev., 17, 4355–4382, https://doi.org/10.5194/gmd-17-4355-2024, 2024. --> A video-tutorial can be found here. 

Input data availability: input datasets and graphs used for the route computations: https://zenodo.org/records/10674079 Intermediate data products: routes for producing figures and tables of the manuscript https://zenodo.org/records/10674082

An online form is now available for providing feedback on the VISIR-2 ship weather routing model.