The black line is the layline
In sailboat racing, a layline is 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 just clear the mark on the correct side (weather side if upwind tacking, leeward side if downwind jibing).
External links
- How to hit the right layline, Yachts and Yachting Magazine
- Lay lines and building startups, Mark Morion.
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