What type of first aid is essential following a diving incident?

The importance of administering oxygen therapy and monitoring vital signs following a diving incident lies in the potential complications that can arise from such incidents, including decompression sickness or pulmonary barotrauma. Oxygen therapy can help mitigate the effects of nitrogen bubbles that may have formed in the bloodstream and tissues, particularly in cases of decompression sickness. This therapy facilitates the elimination of nitrogen, alleviates hypoxia, and supports the diver's recovery.

Monitoring vital signs is equally crucial as it provides immediate information about the diver's condition, allowing for timely intervention if further complications develop. By keeping track of heart rate, blood pressure, and oxygen saturation, responders can assess whether the diver is stable or requires urgent medical attention.

In contrast, the other options do not provide the necessary immediate care that is critical in a diving emergency. Offering water and snacks does not address the physiological risks involved in a diving incident. Performing a quick assessment and continuing the dive could exacerbate any existing injuries, while taking the diver to the nearest dive shop may delay vital interventions needed in the case of a serious medical condition. Thus, the approach of administering oxygen therapy and monitoring vital signs is essential for ensuring the diver's safety and enhancing their chances of recovery.