How does using Nitrox affect the no-decompression limits (NDLs)?

Using Nitrox generally increases no-decompression limits (NDLs) because the composition of Nitrox, which has a higher oxygen content and lower nitrogen content than air, reduces the amount of nitrogen absorbed by the body's tissues during a dive. As nitrogen is the primary gas contributing to decompression sickness risk, by using a gas mixture with less nitrogen, divers can spend longer at certain depths without needing to stop for decompression. This allows for greater flexibility and extended bottom times in recreational diving scenarios.

Nitrox reduces the risk associated with nitrogen loading after dives, enabling divers to ascend safely without exceeding the NDLs. It is important, however, for divers to also consider factors such as oxygen toxicity and to ensure they are within the appropriate depth limits for the specific nitrox blend being used.