The Manual consists of five volumes, spread over two books: Book 2 contains: Volume 3: Mixed Gas Surface Supplied Diving Operations; Surface-Supplied Mixed Gas Diving - Saturation Diving - Breathing Gas Mixing Procedures. Volume 4: Closed Circuit and Semiclosed Circuit Diving Operations; Electronically Controlled Closed-Circuit Underwater Breathing Apparatus (EC-UBA) Diving - Closed Circuit Oxygen UBA (CC-UBA) Diving. Volume 5: Diving Medicine & Recompression Chamber Operations; Diagnosis and Treatment of Decompression Sickness and Arterial Gas Embolism - Recompression Chamber Operation - Neurological Examination - First Aid - Hazardous Marine Creatures. Additionally, the publisher has remastered and redrawn illustrations throughout the Manual for clarity and reading enjoyment, as well as adding icons to cautions and warnings for greater visibility.