Since the Second World War five navies are known to have acquired nuclear weapons, and naval forces and activities around the world have become increasingly important and dangerous. However, there has been no serious consideration of naval arms control for more than forty years. SIPRI gathered together a group of experts from eight nations to consider the problems of naval forces and the possibilities for arms control. This book is a product of that conference, and it presents for the first time a broad and detailed assessment of the dangers of the naval arms race, problems with arms control, possible approaches, confidence-building measures, and verification technologies.