What should a diver do if the dive computer fails during a dive?

When a dive computer fails during a dive, it is crucial for divers to take specific actions to ensure their safety. Selecting the option that suggests all answers are correct indicates that a comprehensive approach is warranted in this situation.

Continuing without any device may not provide the diver with the necessary information regarding depth, time, and ascent rates, which can lead to potential decompression sickness if not managed correctly. Therefore, simply opting to carry on without the computer is not advisable.

Signaling for help might be necessary, particularly if the failure causes confusion or panic, or if the diver is uncertain about their depth and remaining air supply. However, this action alone doesn’t address the immediate need to manage ascent and dive safety effectively.

Choosing to return to the surface instantly poses significant risks, particularly if the ascent is executed too rapidly. This can lead to decompression sickness, making controlled and gradual ascent essential.

The best course of action involves a systematic response, which could include monitoring remaining air supply, analyzing the dive profile while keeping in mind the dive plan, and possibly ascending according to established safety procedures. Selecting the option that encompasses all actions acknowledges that divers should be prepared to respond in a way that assures safety, even when faced with a device malfunction.