What does the term "mayday" signify when transmitted over radio?

The term "mayday" is an internationally recognized distress signal used in emergency situations at sea and in aviation. It indicates that a vessel or aircraft is experiencing a grave and imminent threat to life or property and requires immediate assistance. The use of "mayday" communicates the urgency of the situation to all receiving parties, prompting them to prioritize the response and aid efforts.

In contrast, other forms of communication such as routine messages or requests for information do not convey the same level of urgency or danger associated with "mayday." A warning of severe weather, while important, is categorized differently and does not indicate an immediate threat to life. The specificity of "mayday" within the realm of distress communication is essential for ensuring that resources are mobilized swiftly to assist those in peril.