What is the first step a Divemaster should take during a diver emergency?

The first step a Divemaster should take during a diver emergency is to assess the situation. This crucial action involves gathering information on what has happened, evaluating the diver's condition, checking the surrounding environment, and determining any potential hazards that may pose further risks to both the distressed diver and the rescuer.

By conducting a thorough assessment, the Divemaster can prioritize the appropriate course of action, whether that involves administering first aid, calling for assistance, or initiating a rescue ascent. It ensures that any subsequent actions taken are appropriate for the specific circumstances of the emergency, which can significantly enhance the chances of a successful resolution and the safety of everyone involved.

Other responses might be actions taken after the initial assessment, such as starting oxygen administration or calling for help, but immediate action without understanding the full context could lead to complications or additional dangers. Thus, the assessment phase is foundational for effective emergency response in diving scenarios.