In a non-radar environment, emergency voice reports of an immediate nature are preceded by which word?

In a non-radar environment, emergency voice reports of an immediate nature are preceded by the word "MAYDAY." This term is universally recognized in aviation and maritime contexts as a distress call that indicates a life-threatening emergency requiring immediate assistance. When a pilot or mariner uses "MAYDAY," it clearly communicates to air traffic control or other vessels that there is an urgent situation that demands priority over all other communications.

The use of "MAYDAY" is part of standard emergency protocol and ensures that those receiving the distress signal can quickly ascertain the severity of the situation and react appropriately. It is essential for maintaining safety in both aviation and maritime operations.