This study explores the design, analysis, and enhancement of aerodynamic wind shields for multipurpose vessels (MPVs) to ensure structural safety under green water pressure while contributing to decarbonization and energy efficiency. Initial evaluations using finite element analysis (FEA) identified potential vulnerabilities in the buckling resistance and stress distribution. To address these challenges, the design was reinforced with carling stiffeners and increased plate thickness, effectively redistributing stresses and minimizing localized buckling risks. The results of a post-reinforcement analysis confirmed compliance with the American Bureau of Shipping (ABS) safety criteria, including yield strength, buckling strength, and displacement thresholds. The results demonstrated significant improvements, with eigenvalue buckling factors exceeding safety standards and the maximum displacement well within allowable limits. These enhancements ensure operational reliability under extreme marine conditions. This study underscores the dual benefits of aerodynamic drag reduction and structural integrity, thus advancing fuel efficiency and greenhouse gas emission reductions in alignment with the 2050 decarbonization goals of the International Maritime Organization (IMO). These findings provide a robust framework for extending drag reduction technologies across diverse vessel types, paving the way for sustainable and resilient maritime operations. Future research will focus on developing simplified modeling techniques to accelerate structural safety evaluations.