DiveLogic Learn

DiveLogic Learn

How divers learned
to come back up.

Animated guides to decompression theory, from Haldane’s goats to gradient factors. Every figure runs the real DiveLogic engine.

12 of 12 guides published. The rest are being written now.

Foundations

What pressure does to the gas you breathe, and how your body stores it.

  1. Pressure and the gas lawsBoyle, Dalton and Henry: the three laws every dive obeys.Read
  2. Tissues and half-timesWhy your body loads gas fast at first, then slower and slower.Read

The models

A century of ideas about how fast a diver may come up, told in the order they were found.

  1. Haldane1908Goats, a pressure chamber and the 2 to 1 rule that started staged decompression.Read
  2. Workman and the M-value1965The US Navy replaces a single ratio with a limit for every tissue at every depth.Read
  3. Bühlmann ZHL-161983Sixteen compartments and the model inside most dive computers today.Read
  4. Thalmann and the US Navy1980sGas that leaves the body more slowly than it arrives: the linear-exponential model.Read
  5. Bubble models1980s–2000sVPM and RGBM try to control the bubbles themselves, and pull stops deeper.Read
  6. Gradient factors1990sTwo numbers that let a diver choose how close to the limit to ascend.Read

The body

What goes wrong, why, and what the numbers on your computer are protecting you from.

  1. Decompression sicknessWhat forms, where it goes, and why the same dive treats two divers differently.Read
  2. Oxygen: the CNS clock and OTUsThe gas you need becomes the gas that can hurt you.Read
  3. Narcosis and gas densityWhy deep air feels like a drink, and why thick gas is harder to breathe.Read
  4. Isobaric counterdiffusionWhen switching gas at depth can make bubbles without any ascent at all.Read