What signal is used to communicate information about aircraft in distress?

The use of the term "RESCUE" pertains specifically to the established protocols for communicating distress signals in aviation. This term is vital in emergency situations, as it alerts relevant authorities and nearby aircraft about an aircraft’s urgent need for assistance. When an aircraft sends out a "RESCUE" signal, it is conveying critical information about its situation, thereby initiating the necessary response from search and rescue operations.

In contrast, the other options do not specifically represent established distress communication signals recognized by aviation authorities. Understanding this can be essential for effective communication in emergency scenarios, ensuring that the correct message is conveyed to prompt timely assistance.