This term was derived from a french word m’aidez which means ‘Help Me.’
It is used across the world to alert about life-threatening situations through radio communications, mainly on a ship or plane. The call for the distress signal is made three times in a row. In 1927, the United States adopted Mayday as the official radiotelegraph distress signal. It indicates that potential rescuers need to leave all the work and immediately start the rescue operation. In some countries, the local government organizations such as police, fire safety and transportation authorities also use Mayday as a distress signal.