What is the key factor in detecting stress in Stage 1 before a dive?

Detecting stress in Stage 1 before a dive primarily hinges on effective communication. This is because open and honest dialogue between divers allows for the sharing of feelings, concerns, and overall comfort levels regarding the upcoming dive. Through communication, divers can express any apprehensions or anxieties they may be experiencing, which are crucial indicators of stress. By fostering an environment where divers feel safe to communicate, instructors and fellow divers can identify early signs of stress and address them appropriately before the dive takes place.

While aspects such as physical readiness, experience level, and equipment checks are important factors in the overall safety and preparation for diving, they do not directly relate to the subjective experience of stress. Communication serves as the primary tool that not only helps identify stress but also enables immediate support and reassurance among team members.