Readers of the course book will see that the author, Attila K. Kollár made maximum effort to build up the training materials and elaborate on the details of dives in the relevant chapters in order to ensure safety. 280 pages of materials, hundreds of photographs and illustrations, as well as lots of test questions are provided to make sure that the theoretical knowledge necessary for an advanced diver is acquired. The ten chapters cover the basic rules of navigation, night dives, boat dives, sea cave diving, drift diving and diving around wrecks.