The aid is assistance that is offered to someone when it is faced with a dangerous situation, such assistance may be requested or provided for so independent depending on the circumstances. Despite referring to a general concept, the way of executing an aid may be regulated in some contexts.
Indeed, in certain cases the way to proceed when providing assistance is previously structured, as is the case of requests for assistance in situations of specific catastrophes or setbacks in the maritime or air area.
One of the most popular expressions to ask for help is called "SOS", this is a distress signal that is emitted in Morse code, very easy to understand, especially for those people who may have hearing problems; situation that somehow helped this sign to be recognized internationally. This call for help basically consists of a series of pulses (nine in total) where the first three are short, the three seconds are long and the last three are short again.
Another typical request for help that is made by radio is the famous "mayday" this is a distorted expression of a French woman that refers to the request for help. It is very common for this distress signal to be used in maritime navigation. This is broadcast by radio, as a way to show the situation in a summarized way to anyone who is nearby and can hear the message. When the repetition is triple, it means that the situation is really serious and there is a risk of death for those affected.
On the other hand, there are so-called first aid, these are a series of procedures and techniques of an immediate nature that are usually given to victims of an accident or some unforeseen illness. They are called first aid because they represent the first care offered to people who have some kind of difficulty and who, due to their characteristics, are capable of saving their lives.
It is important to note that the agencies in charge of providing assistance to people are: the red cross, firefighters, policemen, etc.
