What is the definition of "no-decompression limit" in diving?

The concept of "no-decompression limit" refers specifically to the maximum time a diver can spend at a certain depth while ascending directly to the surface without requiring any decompression stops. This limit is crucial for managing nitrogen absorption during a dive. As a diver descends and spends time at depth, nitrogen from the breathing gas is absorbed into the body's tissues. If a diver exceeds the no-decompression limit, they risk developing decompression sickness, commonly known as "the bends," which occurs when nitrogen comes out of solution and forms bubbles in the body as pressure decreases during ascent.

Diving tables and dive computers provide these limits based on the depth and time spent underwater, ensuring that divers can return to the surface safely. Understanding and adhering to no-decompression limits is essential for any diver to prevent potential injuries related to decompression. Each depth has its own associated no-decompression limit, which divers must be familiar with in order to plan their dives safely.