If a diver successfully completes a dive within 24 hours, what is the maximum allowed oxygen time for subsequent dives?

When considering the maximum allowed oxygen time for subsequent dives within 24 hours after a successful dive, it's important to understand how oxygen exposure is managed to ensure diver safety and prevent potential toxicity.

The correct choice indicates that a diver can have a total of 240 minutes of oxygen time for subsequent dives. This total reflects the cumulative limits established by diving protocols, which take into account factors like the depth, duration of dives, and the type of dive that was previously completed. To minimize the risk of hyperoxia—a condition resulting from excessive oxygen exposure—these guidelines are essential for safe diving practices.

Overall, the 240-minute allowance is designed to provide flexibility while ensuring the diver remains within safe exposure limits. This understanding is crucial for anyone involved in diving operations, emphasizing the importance of strict adherence to oxygen time regulations as part of a comprehensive dive plan.