Which is NOT a part of the distress message acknowledgement procedure?

The procedure for acknowledging a distress message involves specific elements to ensure clear communication during emergencies. When a distress signal, represented by "MAYDAY," is received, the acknowledging station provides confirmation in the form of a call sign and a verbal acknowledgment that the message has been received. This typically includes the stated phrase "RECEIVED MAYDAY" to clearly indicate the nature of the distress call and ensure that the sender is aware their distress message has been acknowledged.

Although confirmation from Air Traffic Control (ATC) regarding the distress signal is critical in managing an emergency, it is not an intrinsic part of the specific procedure for acknowledging the receipt of the distress message itself. The acknowledgment procedure primarily revolves around confirming receipt of the distress message from the station in distress, an essential protocol for effective communication in emergency situations.