Bühlmann ZH-L16 algorithm

The Bühlmann ZH-L16 is a mathematical model that calculates how much nitrogen stays in your body during a dive. It helps your dive computer decide when you must stop to avoid decompression sickness. Most modern computers, like the Shearwater Perdix or Suunto D4, use variations of this logic. The algorithm uses 16 different tissue compartments to track gas levels. These compartments range from fast-acting blood tissues to slow-acting fat tissues. While it is very reliable, you should not rely on it blindly. I often see divers push their limits because they trust the computer too much. Always add a safety margin if you dive in cold water or feel tired. A conservative setting on your device is better than a risky ascent. Stick to your plan.