The maritime industry faces challenges in meeting emission standards, leading to the exploration of low-carbon alternatives like hydrogen, ammonia, and natural gas. While ammonia presents challenges due to its properties, hydrogen emerges as a promising solution with its various advantages and applications in green energy ships. Hydrogen-blended natural gas (HBNG) is being considered for reducing emissions in the shipping industry, enhancing engine efficiency, and aligning with environmental regulations. Despite the potential benefits, safety concerns related to hydrogen storage, leaks, and explosions persist. Research is ongoing to improve safety measures and risk assessments, especially in engine rooms where HBNG is utilized. Developed countries are investing in hydrogen projects, emphasizing the need for efficient and safe hydrogen implementation in the maritime sector. Overall, while hydrogen offers significant environmental benefits and innovation in the industry, addressing safety challenges is crucial for its widespread adoption in maritime applications.