What should you do if you experience a computer failure underwater?

If you experience a computer failure underwater, signaling your buddy and ascending together while they monitor your ascent is a prudent response. Your dive computer is essential for keeping track of your depth, time, and no-decompression limits. Without it, you might not have accurate information about your dive profile, which can significantly increase the risk of decompression sickness.

Ascending with a buddy provides mutual support and safety, allowing one diver to monitor the other and ensure a safe ascent rate, which is crucial when diving without a functioning computer. This approach enhances safety measures, as both divers can share their dive experience and help manage any potential risks during the ascent.

While having a backup computer is also a valid safety measure, using it assumes that you have one on hand and that it is functioning correctly. Attempting to fix your primary computer underwater can be risky and may divert attention from maintaining safety. Completing the dive without addressing the issue is not advisable since this neglects the critical information that the malfunctioning computer can provide. Hence, the decision to ascend safely with a buddy is the best option in this scenario.