What should a diver do if they feel lightheaded after using enriched air?

Feeling lightheaded after using enriched air can indicate a potential issue, such as oxygen toxicity or other physiological responses to the gas mix. In this situation, signaling for a buddy to assist is the most prudent action. A buddy can provide immediate support and help ensure the diver's safety. They can assist with buoyancy control, monitor the diver’s condition, and be prepared to initiate an emergency ascent if necessary.

This option emphasizes the importance of buddy assistance in diving, as divers rely on each other for safety. It recognizes that individual divers may not be able to effectively manage their situation and that teamwork is crucial in addressing any health concerns during a dive.

While inflating a buoyancy control device to surface may seem like a logical step, rushing to the surface without proper assessment or support can lead to additional risks, such as decompression illness.

It’s also essential to note that while ascending to the surface might be necessary in extreme situations, doing so without assistance or a proper plan can be dangerous, especially if the diver is overly lightheaded or disoriented.

Continuing the dive until the next day is not a safe or responsible option, as it ignores the symptoms being experienced. Prioritizing health and safety should always take precedence over completing dives