What is the first and most critical step when performing a self-rescue?

The most critical first step when performing a self-rescue is to attach the snaphook to an appropriate anchor point. This action is vital because it ensures that the rescuer is secured to a reliable point, which is necessary for both stability and safety during the rescue process. By attaching the snaphook to an anchor, the individual significantly minimizes the risk of further injury or falling, allowing them to focus on the next steps of the rescue operation.

Establishing this secure connection to an anchor point is foundational to any self-rescue maneuver. It provides the necessary safety and leverage needed for the rescuer to execute subsequent actions, such as lowering themselves or moving to another location. Without this secure attachment, any further actions taken could endanger the person attempting the rescue.

While the other options involve steps that may be relevant in various contexts of rescue operations, they do not address the immediate need for safety and security in the critical initial moment of self-rescue.