What is the primary function of the signaling device in the EPRC survival kit?

The primary function of the signaling device in the EPRC survival kit is to mark the pilot's location for rescue operations. This device is specifically designed to ensure that rescuers can easily identify the location of an individual in distress, such as a downed pilot. In survival scenarios, visibility is crucial, and the signaling device emits signals that can be seen from a distance, allowing search and rescue teams to pinpoint the exact location of the pilot. This capability significantly increases the chances of a successful rescue and is critical for the overall safety and effectiveness of survival operations.

While the other options might suggest various uses for signaling devices, they do not align with the primary objective in a survival context, which focuses strictly on facilitating rescue efforts.