Maritime development in Indonesia faces problems and necessitates the construction of integrated national policy law. Coastal communities lack understanding and awareness of archipelagic states across various aspects. Challenges include the absence of clear deep water boundaries and the role of defense and resilience from a maritime perspective. This study focuses on two key problems: 1) the legal construction of integrated national policy on maritime development in Indonesia and 2) the development of a strategic environment for maritime development. Empirical juridical research methods were employed. Research on internationally recognized rules of the law of the sea is crucial as a reference for countries determining maritime policy. Indonesia has implemented its rights and obligations under UNCLOS 1982 through national laws and regulations, but there is a need for further integrated national policy construction for maritime development. The strategy for maritime development involves revitalizing marine economic sectors through strengthened policies.