Helicopters are very different from airplanes. They can do three things that airplanes cannot do. First,
when airplanes move upward, they must also move forward, but helicopters can move straight up without
moving ahead. Second, helicopters can fly backward, which airplanes cannot do. Third, helicopters can use their
rotors to hover in the air (stay in one place) which is impossible for planes.
Because helicopters can perform actions that airplanes cannot, they are used for different tasks. Since
helicopters can take off without moving forward, they do not need a runway for takeoff. They are used in
congested areas where there is no room for airplanes or in isolated areas which do not have airports. Because
they can hover, they are used on firefighting missions to drop water on fires. They are used in logging
operations to lift trees out of forests. Helicopters are used as air ambulances to airlift patients out of situations
which are difficult to reach by conventional ambulances. The police use helicopters to follow suspects on the
ground or to search for cars on the ground. Of course, helicopters have military uses because of their design and
capabilities.