It has been over forty years now since the present International Regulations for Preventing Collisions at Sea-the Collision Regulations-came into force。 It's been over forty years in which there have been considerable technological improvements in ship design and equipment。 Despite these improvements， however， mariners are still having collisions; and marine lawyers are still being called upon to settle liability for these collisions。 Understanding how the courts interpret the Collision Regulations and apportion liability， therefore， will benefit both the mariner and the marine lawyer and all those involved in teaching the rules and investigating the causes of collisions at sea。 This book is for you。