Change in wind direction requiring sail adjustment.
The side facing into the wind.
Efficiency and control when sailing toward the wind.
Tactical decisions involving wind shifts and positioning.
Reinforcements that prevent fluttering and add aerodynamic lift.
The curve or fullness of a sail affecting power and lift.
The act of hoisting, trimming, and lowering sails safely.
Adjusting sail shape and angle to maximize performance.
Optimal performance achieved through balance and trim.
Methods and maneuvers used to operate and control a sailboat.
Local wind created by temperature differences between land and sea.
Skillful handling of a vessel under all conditions.
The tightness of ropes controlling sail angle.
Boats actual speed relative to the earths surface.
Boats speed relative to the water it moves through.
To turn the bow of the boat through the wind to change direction.
Lower front corner of a sail attached to the deck or boom.
The side of the boat the wind is coming from (port or starboard).
The degree of turn required to sail upwind in a zigzag pattern.
Streamers on sails indicating airflow direction and trim accuracy.
Horizontal water movement caused by changing tides.
Track system adjusting mainsail position laterally across the boat.
The actual wind direction and speed relative to the earth.
Traveling against the direction of the wind using tacking.
The force generated by a sail that propels the boat forward.
Techniques for maximizing movement in gentle breezes.
Flapping of the sail when not properly trimmed or overpowered.
Temporary drop in wind strength.
Allowing the boat to drift freely with sails down in heavy weather.
Primary sail attached to the main mast and boom.
