Some occupations require the workers to swim. For example, ears of sea or fishermen of per them to swim and to dive to obtain an economic benefit, like the fishing ones send.
Swimming is used to rescue other swimmers in hardships. In the US., most of the cities and the states they have life-guards trained, like the life-guards city of Los Angeles, unfolded in the swimming pools and beaches. There is a number of styles of swimming specialized in special with rescue aims (the list of swimming styles is seen). These techniques are studied by person who renders first aids or members of the Coastal Guard. The formation of these techniques also has become competitions such as to save the life of surf.
Swimming also is used in marine Biology to observe the plants and animals in its natural habitat. Other swimming to use sciences, for example, Konrad Lorenz with gansos swam like part of their studies of the behavior animal.
Swimming also has military aims. military swimming generally is made by the special forces, like the Navy Seals. Swimming is used to approach a place, to collect to data of intelligence, sabotage or battle, and to leave a location. This also can include the insertion in the air in the water or the exit of a submarine while it is submerged. Due to the regular exhibition to the great masses of water, all the recruits in the Navy of the United States, Body of Marines and the Coastal Guard are necessary to complete the swimming of base or training of water survival.