1. They actually shout mayday in English.
2, Mayday is the international common radio distress signal, generally used for aircraft or ships in distress, need external help, through the radio voice.
3, in the movie, the plane or ship is generally in danger, by the pilot, captain or radio operator with the radio shout out this word, inform the rear base or nearby personnel that their vehicle is about to crash or sink, and quickly send someone to search and rescue.
4, Mayday is not limited to the military field, in the field of civil aviation, navigation, are used to express distress.
5. In addition, some people have suggested that it may be called medic, which means medic. This is usually someone who is seriously injured, and the comrades beside him call the accompanying medic to come and rescue. But the medic is usually accompanying, do not have to shout at the radio, because the radio is usually used to communicate between the troops, command the operation. Calling medics at the radio station is far from hydrolyzing near thirst, and it affects the important liaison and command of the troops.
In aviation, mayday means that a situation is so urgent that it requires a forced landing or other emergency measures. The word comes from a French word (I forget the exact meaning, emergency, need to be rescued), because it sounds similar to the English word Mayday, which is more widely used, so it became Mayday.
Because radios are often disturbed and noisy, a simple word like mayday is easier to distinguish among the noise, so it can eventually become a universal distress signal
This is the international common distress call, aviation and navigation in the emergency need for rescue, will be called continuously, each call three times, this word comes from the French, the pronunciation sounds the same as MAYDAY, so it is required to call three times in succession, in case of false alarms.
MAYDAY is an expression used to ask for advice when a spacecraft or craft is in danger.
The reason is said to be because the pronunciation is exhaled, which conveys more clearly and is shorter.