Table of Contents 11
5 Dive Tables and Dive Computers 56
Learning Goals ........................................57
Dive Tables ............................................. 57
EAN Dive Tables Theory ........................ 57
NAUI's EAN Dive Tables ....................... 58
Equivalent Air Depth and
Standard Air Dive Tables .................... 60
Equivalent Air Depth by Table ............... 60
Calculating Equivalent Air Depth ........... 62
Using the NAUI MobileTM App to
Determine Equivalent Air Depth ............ 63
Using the NAUI RGBM Nitrox
Dive Tables ........................................... 63
The Rule of Halves ................................. 64
Di ve Computers and Nitrox ................... 64
Professionals Leading the Way .............66
6 Oxygen Precautions and
Preparing Nitrox 68
Learning Goals.........................................69
Oxygen Handling .....................................69
Equipment Considerations ....................70
Oxygen Cleaning .....................................70
The 40% Rule ..........................................70
Equipment Preparation ...........................70
How Nitrox is Made .................................71
Partial Pressure Mixing ...........................71
Continuous-Flow Mixing ..........................72
Pre-Mix ....................................................72
Pressure Swing Absorption ....................73
Membrane Separation ............................73
Your Responsibility ................................74
7 Knowing What You Breathe 76
Learning Goals ........................................77
Oxygen Analyzers ...................................77
Analyzing Your Gas ................................78
Cylinder Labeling ................................... 79
Filling Out the Logbook ......................... 79
Appendix A: Answers to Review
Questions 82
Appendix B: Responsible Diving 84
Appendix C: Checklists 86
Appendix D: Dive Tables, Planners,
Charts and Formulas 90
Glossary 102
Index 108