Autonomous Surface Vessels (ASVs) encounter diverse environmental conditions, from calm waters to turbulent scenarios with currents, winds, and waves. In challenging conditions, unmodeled dynamics threaten safety and reliability, surpassing conventional control capabilities. This study presents experimental results of constructing and controlling a catamaran-type ASV to address these challenges. The chosen catamaran design, known for stability and maneuverability, undergoes rigorous testing in varied conditions. The study delves into the complexities of ASV modeling, emphasizing dynamic behaviors crucial for effective control system design. Implemented model-based control strategies prove successful in mitigating unmodeled dynamics, and meeting stringent design requirements. Experimental results showcase the ASV’s capability to navigate challenging environments safely and reliably.