Scuba Diving International (SDI) Computer Nitrox Practice Exam

Can divers limit the adverse effects of long-term exposure to nitrogen by diving Nitrox fewer than 20 times a year?

1. True

2. False

The correct answer is: False

Diving with Nitrox does provide an opportunity for divers to reduce their exposure to nitrogen narcosis and other nitrogen-related issues during individual dives due to its higher concentration of oxygen and lower concentration of nitrogen compared to regular air. However, the statement about limiting the adverse effects of long-term exposure to nitrogen through the frequency of diving is not accurate. The potential for nitrogen-related issues is influenced not only by the number of dives but also by the volume of nitrogen that is absorbed by the body during those dives. A diver can experience nitrogen buildup with any number of dives, and the risks associated with repetitive diving can accumulate regardless of the number of annual dives performed. Therefore, the idea that limiting dives to fewer than 20 times a year would effectively mitigate long-term exposure to nitrogen is misleading. Divers must consider a range of factors, including their dive profiles, the depth and duration of their dives, and the overall health management and use of appropriate dive tables or computers for planning. In summary, while diving Nitrox can help manage nitrogen exposure on an individual dive basis, simply reducing the number of dives annually does not guarantee a decrease in long-term nitrogen exposure effects. Thus, the response is aligned with the understanding that frequency of diving alone does not effectively limit nitrogen