For several generations, the U.S. Navy Diving Manual has been considered the Bible of both military diving and the commercial diving industry, regardless of where in the world these operations were performed. In the past, the U.S. Navy Diver’s Handbook was the go-to source for military and commercial divers when they were in the field and did not wish to carry the complete manual with them. The last official printing of the handbook was in 1994, and there has been a desperate requirement for a handbook for the commercial diver ever since. The Commercial Diver’s Handbook fills that requirement and more, presenting the three most commonly used decompression tables world-wide, as well as the latest tables for the treatment of pressure-related illness and injury. In addition, an updated diving medicine section is presented; a section on enriched air (Nitrox); and the Canadian Navy surface mixed gas tables as well. The technical editing was provided by CPO1 Charles Trombley, Canadian Navy, formerly of Canada’s Experimental Diving Unit, and currently Chief Diver, Fleet Diving Unit Atlantic. This handbook will prove to be a valuable tool in every commercial diver and diving supervisor’s pocket, no matter where in the world they find themselves working.