RGBM — Reduced Gradient Bubble Model

The Reduced Gradient Bubble Model is a mathematical formula that calculates how much nitrogen stays in your body. It helps your dive computer decide when you can safely ascend to the surface. Most modern computers, like those from Suunto or Mares, use this model to manage bubble growth during repetitive dives. While traditional models look only at dissolved gas, RGBM accounts for the actual bubbles that form in your blood. This is useful because it allows for shorter surface intervals between dives in places like Koh Tao. You should avoid rapid ascents even if the computer says you are safe. Many divers ignore the gradual ascent rate because they want to finish their day early. Always follow the ascent profile strictly since bubble management depends on consistent pressure changes.