If you accidentally exceed the maximum oxygen limits of your dive computer, what should you do?

The appropriate response after exceeding the maximum oxygen limits set by your dive computer is to ascend immediately but slowly and make a safety stop. This is important for a few reasons.

First, exceeding the maximum partial pressure of oxygen can lead to oxygen toxicity, which can have serious health implications, including convulsions and other potentially life-threatening conditions. Ascending helps to mitigate the risk associated with exposure to high levels of oxygen at depth.

When ascending slowly, you're allowing your body to safely off-gas nitrogen and other dissolved gases at a controlled rate, minimizing the risk of decompression sickness. Making a safety stop at around 15 feet (5 meters) for three to five minutes can further aid in off-gassing, helping to ensure a safer return to the surface.

While it's important to keep an eye on your symptoms and to maintain communication with your diving partner or instructor in such situations, immediate ascent is a priority once you recognize that you have surpassed the recommended limits. This proactive approach can help safeguard your health and wellbeing during the dive.