This book enables divers to have a thorough understanding of some of the medical problems and illnesses associated with diving. After reading this book you will be able to fully recognize each of the individual conditions and have a clear understanding of the best action to take in the event of decompression illness. It is suitable for all levels of experience from novice to instructor. It explains topics in clear non-medical language. It is a guide to initial treatment and first aid. It includes emergency action charts and recompression tables. It contains emergency contact numbers and recompression tables.