What is a recommended practice when planning a repetitive dive using enriched air?

When planning a repetitive dive using enriched air, implementing longer surface intervals is a recommended practice because it allows for adequate off-gassing of nitrogen from the body. After a dive, nitrogen builds up in the body tissues, and a longer surface interval gives the body more time to eliminate this nitrogen safely. This is particularly important with enriched air, which has a higher percentage of oxygen and can affect how your body processes nitrogen.

By extending the surface interval, divers can help reduce the risk of decompression sickness on repetitive dives. This practice is beneficial regardless of the depth or duration of the previous dive, as it promotes overall safety and ensures that divers are better prepared for their next dive.

Shortening the duration of the dive or going deeper than the last dive could increase the amount of nitrogen absorbed by the body, and ignoring previous dive profiles disregards crucial information needed to plan safe dives. Thus, opting for longer surface intervals is the best approach to ensure safe diving practices with enriched air.