This book provides the first comprehensive critical analysis of the regulation of naval weapons during armed conflict. It examines the experience this century with the use of naval mines, submarines and anti-ship missiles, the three main naval weapons. The sources of international law relevantto an assessment of the law, that is the extant conventions, state practice, military manuals, war crimes prosecutions, and the opinions of publicists, are each extensively examined so that a clear picture of the law emerges. The book examines the impact of agreements drawn up in peacetime onwartime conduct and focuses on the growth of law through customary practice. While stating the law as it is today, it also provides suggestions for the practical development of the law.