The maritime industry is undergoing a sustainable revolution with a focus on reducing emissions and environmental impact. The International Maritime Organization is spearheading efforts to make shipping climate-neutral by 2050, driving the adoption of alternative fuels like hydrogen fuel cells. These fuel cells offer high efficiency, minimal wear and noise emissions, and almost zero pollutant emissions when using green hydrogen. Their flexibility allows for versatile onboard applications, from powering batteries to serving as the main propulsion system. To ensure safe and efficient operation, automation solutions like the PLCnext Technology ecosystem are employed. This system enables reliable monitoring and control of hydrogen fuel cells on ships, overseeing various parameters like pressures, concentrations, and temperatures for optimal performance. Additionally, the system ensures the management of drives and valves, enhancing the safety and efficiency of the fuel cells. The implementation of hydrogen fuel cells represents a significant step towards sustainable shipping practices, aligning with global environmental goals and driving innovation in the maritime industry. With the potential to revolutionize energy supply on ships, hydrogen fuel cells offer a cleaner and more efficient alternative to traditional fuels, paving the way for a greener future in maritime transportation.