How does the dive computer need to be adjusted for diving with enriched air?

For diving with enriched air, adjusting the dive computer to the specific EANx mix being used is essential. Enriched air has a higher oxygen content than regular air (which is about 21% oxygen). This adjustment allows the dive computer to accurately calculate no-decompression limits, ascent rates, and overall safety during the dive.

When you input the specific blend of enriched air, the dive computer can properly account for the increased oxygen levels, which can influence your exposure to nitrogen and the potential for oxygen toxicity at greater depths. Failure to set it according to the EANx mix could result in incorrect depth and time calculations, significantly affecting your safety while diving.

In contrast, resetting the dive computer before each dive is not specifically required for enriched air, as the most critical adjustment involves entering the precise oxygen percentage of the gas mix. While some may think it's unnecessary to adjust the dive computer at all when using enriched air, this could lead to incorrect data and increased risks. Setting it to a standard air mix of 21% oxygen would also be inappropriate and unsafe for enriched air diving, as it would not provide accurate information based on the different gas mixture being used.