Who is typically the most immediate source of assistance to a diver in distress?

The diving buddy is typically considered the most immediate source of assistance to a diver in distress due to the close proximity and shared responsibility inherent in buddy diving systems. This approach is foundational in scuba diving training, where divers are taught to remain within a certain range of one another and to actively look out for each other’s safety.

In an emergency situation, a buddy can provide immediate support and assistance—offering physical help, sharing equipment, and ensuring the distressed diver's safety. They are trained to recognize signs of distress and respond swiftly, potentially preventing the situation from escalating further.

While other options such as the dive master, nearby swimmers, and rescue personnel can offer assistance, they are not always within immediate reach or may take longer to respond. The dive master is usually responsible for leading and managing the dive but might not be in a position to offer help right away. Nearby swimmers may not be trained in diving emergency protocols, and rescue personnel from the boat would take additional time to arrive at the scene. Thus, the buddy is the first line of support in ensuring dive safety.