Submarines in International Law is the first book to explore both the legal history and the contemporary regulation of submarine operations in varied areas of international law. The analysis demonstrates the instances where submarines influenced the development of the law of the sea and the law of armed conflict, as well as highlighting where international law needs to give greater account for submarines in existing bodies of law-including international marine environmental law, the law on the use of force, navigational safety rules, transnational criminal law and international cultural heritage law. Submarine operations range from military and defence uses, to supporting research and commercial seabed industries, to ocean tourism and smuggling of illicit goods. International law regulates all these activities to varying degrees. While submarines may strive to be evasive objects in the ocean, this book demonstrates why they cannot and should not elude the reach of international law.