The purpose of this article is to examine the key elements of the legal framework in which naval mines are used both across the spectrum of conflict and during peacetime. The article will also consider the legal issues associated with the use of mines by States in international armed conflict, and address the distinct legal issues which arise in non-international armed conflict, where the emergence of an increasing presence of non-State armed groups has been a hallmark of the late twentieth and early twenty-first centuries. The obligations placed upon States in peacetime, and under the law of neutrality, when the use and presence of naval mines is a relevant factor will also be analyzed.