You check your dive computer. Depth: 18 metres.Dive time: 22 minutes.NDL: 14 minutes. Everything looks fine. You can read the numbers. You know your limits. Perhaps you have been diving for years, and checking your computer has become second nature. But have you ever asked yourself this question? Do you actually understand what the numbers on your screen mean, or have you simply learned to read them? Reading Data Is Not the Same as Understanding It Dive computers make a signi

Underwater, we can move in almost any direction. But true freedom isn't simply the ability to move anywhere. It is knowing when to move—and when to remain perfectly still.