Which gas adds significant benefits to multi-level computer diving?

Using Nitrox, specifically enriched air Nitrox, offers significant benefits for multi-level computer diving due to its higher oxygen content and lower nitrogen content compared to standard air. The increased oxygen percentage allows divers to extend their bottom times while staying within safe limits for nitrogen absorption, effectively reducing the risks associated with nitrogen narcosis and decompression sickness.

Multi-level diving involves making stops at different depths, allowing divers to optimize their ascent profiles. By using Nitrox, divers can take advantage of reduced nitrogen exposure, which enables longer dives at shallower depths without accumulating excessive nitrogen in their tissues. This is particularly advantageous in multi-level diving scenarios where divers frequently adjust their depth and time underwater.

Additionally, divers using Nitrox have the potential for shorter surface recovery times before their next dive, thanks to the reduced nitrogen load. This aligns well with the strategy of multi-level diving, where divers may wish to maximize their overall dive time or fit multiple dives within a limited time frame.

Other gases such as nitrogen and air don't provide these enhanced benefits, while pure oxygen is primarily used in specific situations like decompression rather than as a diving gas for extended recreational dives. Thus, Nitrox is the optimal choice for divers looking to maximize their efficiency and safety during multi-level diving