This book presents advanced techniques for divers wishing to go on to more ambitious explorations. It looks at planning and leading a dive, at diving conditions around the world and how to understand and use the decompression tables. Diving around wrecks is covered in detail, with advice on equipment, navigation and research, and methods of underwater searching. The book provides an introduction to specialist diving activities such as cave diving, ice diving and deep diving, and considers the organization and running of expeditions at home and abroad. The book includes information on safety regulations and salvage law and is fully illustrated throughout.