The beam of a ship is its width at the widest point as measured at the ship's nominal waterline.
A boat is a watercraft of a large range of type and size.
Chain girth is a measurement of a yacht hull.
In sailing and boating, a vessel's freeboard is the distance from the waterline to the upper deck level, measured at the lowest point of sheer where water can enter the boat or ship.
The International rule, also known as the Metre rule, was created for the measuring and rating of yachts to allow different designs of yacht to race together under a handicap system.
The modern Olympic Games or Olympics (Jeux olympiques) are leading international sporting events featuring summer and winter sports competitions in which thousands of athletes from around the world participate in a variety of competitions.
A sail is a tensile structure—made from fabric or other membrane materials—that uses wind power to propel sailing craft, including sailing ships, sailboats, windsurfers, ice boats, and even sail-powered land vehicles.
Sailing/Yachting is an Olympic sport starting from the Games of the 1st Olympiad (1896 Olympics in Athens, Greece).
The waterline is the line where the hull of a ship meets the surface of the water.
Yacht racing is a form of sport involving sailing yachts and larger sailboats, as distinguished from dinghy racing.