This report summarizes the workshop held on February 26–27, 2014 on the law governing the use of naval mines in times of both peace and war. The workshop, organized by Chatham House, the Royal Navy and U.S. Naval War College, brought together a group of international law scholars, operational lawyers and other legal experts in the field. The objective of the workshop was to clarify existing law and identify areas of legal uncertainty to assist States to conduct their operations lawfully