Global developments and trends are one of the factors that greatly influence the dynamics of regional security. The issue of regional security is still covered by potential conflicts, such as territorial sovereignty claims, transnational security threats, interstate conflicts based on territorial claims and maritime security. The research is a normative-juridical research, using a statute, conceptual and case approaches. The results show that the unilateral claim of Indonesia for delimiting sea boundaries with neighboring countries is an act that has legal legality, because it is done based on the provisions of the convention. The construction of dispute resolution over overlapping claims on the borders of Indonesia’ maritime territory with neighboring countries, it can be concluded that the determination of delimitation of sea territory between archipelagic countries such as Indonesia and coastal States must provide a just solution for countries. In determining the delimitation of sea boundaries between archipelagic countries such as Indonesia and neighboring countries, it must be based on the fairness principle by considering political, legal and technical aspects to achieve an equitable solution while still considers special or relevant circumstances.