What should a diver do if they feel uncomfortable or sick while underwater?

If a diver feels uncomfortable or sick while underwater, signaling their buddy and ascending slowly is the safest and most prudent action. This method ensures that the diver receives immediate assistance from their diving partner, who can provide support and monitor the situation closely. In addition to safety, ascending slowly helps to minimize the risk of barotrauma or decompression sickness, which can occur if a diver ascends too quickly.

The buddy system is a crucial aspect of diving; divers rely on their partners for safety and support during emergencies. By communicating their need to ascend, the diver can be assured that they are not alone, and their companion can assist them and prepare for any necessary actions, such as providing first aid if the discomfort worsens.

Addressing the issue alone can lead to worsening conditions without help. Increasing breathing rate may induce hyperventilation, which can create further complications. Continuing to dive despite discomfort is inherently risky, as it can lead to serious health issues. Therefore, signaling the buddy and ascending is the most responsible approach to ensuring both the diver's safety and wellbeing while underwater.