Worked on the FESOM/fesom2 repository to enhance the maintainability of grid remapping code by removing obsolete vector-related logic from the nemogcmcoup_coupinit module. Focused on code refactoring and legacy code maintenance using Fortran, the changes eliminated unused initialization and handling of interpolation weights for remapping between atmospheric Gaussian grids and ocean UV-grids. This cleanup simplified the initialization pathway, reduced code complexity, and minimized potential sources of error, setting a clearer baseline for future development. No bug fixes were addressed during this period, as the primary contribution centered on improving code quality and reducing long-term maintenance overhead in the project.