Sailing 

Sailing is a water sport using a boat, sails, wind and water to increase, maintain or decrease speed.

By changing the rigging, rudder and dagger or center board, a sailor manages the force of the wind on the sails in order to change the direction and speed.
This sport relies on the skill of the athlete and weather conditions.

Windsurfing

Windsurfing is a surface water sport that is a combination of surfing and sailing. It is also referred to as "sailboarding" and "boardsailing," and emerged in the late 1960s from the surf culture of California.