The evolving landscape of maritime security is increasingly shaped by the integration of cyber technologies into naval operations, posing complex legal challenges under international maritime law. This paper examines the 2016 Bowditch incident, in which a U.S. Navy Unmanned Underwater Vehicle was detained by the Chinese navy, as a case study for comprehending the legal implications of maritime military cyber operations. The research delves into the ambiguous legal standing of unmanned underwater vehicles and their activities, particularly within the framework of the United Nations Convention on the Law of the Sea. Through a detailed analysis of the incident, this study identifies significant gaps in existing legal frameworks and advocates for the urgent need to augment international law to adequately address the emergence of cyber technologies in maritime military operations. The findings underscore the crucial role of international consensus in defining the legal status of unmanned maritime systems and the norms governing maritime military cyber operations, essential for upholding global maritime security and stability.