What must a rescue diver do before attempting a rescue in open water?

Before attempting a rescue in open water, it is critical for a rescue diver to assess the environment for hazards and evaluate their own capabilities. This assessment involves identifying potential dangers such as strong currents, rough waves, underwater obstacles, and other factors that could complicate the rescue attempt. By understanding these elements, the diver can make informed decisions about whether it is safe to proceed with the rescue and how to execute it effectively without putting themselves in danger.

Additionally, evaluating personal skills and experience is essential. The diver must consider their own physical condition, training level, and comfort in the given conditions. This self-assessment ensures that the diver is capable of managing the rescue situation, which can often be physically and mentally strenuous.

While the other options may seem relevant, they do not encompass the comprehensive safety and risk assessment that is crucial prior to any rescue operation. Checking diving gear, notifying others, and seeking professional assistance are important steps, but they should follow the fundamental assessment of hazards and the diver's readiness to handle the situation. Prioritizing environmental awareness and personal capability lays the foundation for a successful and safe rescue.