Helicopters are widely used because of the advantages that many other aircrafts are difficult or impossible to do. Because they can take off and land vertically, they do not need large-area airports. They are mainly used for sightseeing, fire rescue, maritime first aid, anti smuggling and anti drug, fire control, business transportation, medical assistance, communication, spraying pesticides and insecticides, eliminating pests, detecting resources, etc All departments of the economy.
The number of helicopters in the world is growing. Armed helicopter: a helicopter equipped with weapons and carrying out combat tasks. Also known as attack helicopter or assault helicopter. It is mainly used to attack ground, surface and underwater targets, escort transport helicopters and conduct air combat with enemy helicopters. It has the characteristics of flexibility, quick response, suitable for low altitude and ultra-low altitude approach attack, and can fire in the state of movement and hovering. It is a new type of aircraft for direct fire support.