Diving, Underwater, is the way people reach the strange and beautiful world beneath the surface of oceans, lakes, and rivers. Ancient peoples dived underwater in search of fish, other water animals, and plants for food. With improved skills and equipment, many activities began to be performed underwater.
Today, divers repair ships, recover valuable objects, build and repair various types of structures, and conduct research. Work can be performed at great depths in specially equipped diving vehicles. In the armed services, divers and submarines carry out military missions. Many people enjoy underwater diving as a sport. They dive to study underwater life, to take photographs, to hunt water animals, or simply to explore.

