Why is the expression “Mayday” used as a distress call?

The term mayday is the internationally recognized radio telephone signal of distress. It is only used when a ship is in great danger and needs help immediately. The signal is transmitted on a wavelength of 2,182 kHz, which is permanently monitored by rescue services on the shore. The use of the expressions has a very straightforward explanation.

It simply came form the French phrase “m’aidez” which means help me. It was officially adopted internationally in 1927