(n) :
In sailboat racing, an imaginary line extending from the objective (typically a racing mark) to indicate the point at which a boat should tack or jibe in order to clear the mark on the correct side.
(n) :
In sailboat racing, an imaginary line extending from the objective (typically a racing mark) to indicate the point at which a boat should tack or jibe in order to clear the mark on the correct side.