Glossary
Apparent Wind- The altered wind direction and velocity, which is different from the true wind direction, because of the motion of the weather station.
Backstay- Is the standing rigging that runs from the top of the mast to the transom; helps pull the top of the mast aft.
Bridle- A fixed piece of line that, when shortened or lengthened, affects the boom position relative to the boat's centerline.
Center of Effort- Is the theoretical focal point of the force generated by the wind acting on the sail(s).
Center of Lateral Resistance- Is the focal point of all the forces resisting slipping sideways through the water.
Channel- The area of water between the nuns and cans.
Chart- A "road map" that sailors use on the water.
Cirrus Clouds- Wispy, and thin clouds; indicator of good weather for the day, but may be prediction that a change in weather is on the way.
Compression Battens- The battens that extend from the luff to the leech of the main.
Cumulonimbus Clouds- Towering or "thunderhead" clouds; indicator of severe conditions, including heavy rain and lightning.
Cumulus Clouds- Large, white, and fluffy clouds; indicator of good weather.
Current- The horizontal flow of water; described in terms of the direction and speed the water is moving.
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Dacron- Also known as polyster lines; typically used for towing.
Ditty Bag- A small pouch where a sailor keeps tools, a knife, spare parts, a whistle, extra line, and other useful parts, pieces, and safety devices.
Draft- The depth and location of the curvature in a sail.
Drag- Is a slowing force resulting from the friction of a boat moving through the water.
Ebbing- A tide that is going out or dropping.
Fathom- A unit of length equal to six feet (1.83 meters) used especially for measuring the depth of water.
Feathering- The act of scalloping slightly towards the No-Go Zone for each puff and returning to the groove as the puff abates.
Flooding- A tide that is incoming or raising.
Footing- The act of easing sails slightly and heading down to the lower side of the groove, perhaps even into a close reach, providing more power.
Give-way Vessel- The boat that should alter course and/or speed to pass at a safe distance.
Groove- Is the course between the high and low side of close hauled, when you are making the best speed and achieving the highest pointing angle toward the wind.
Header- The wind’s direction shifts from stern to bow.
Heaving-To- A method for stopping the boat to rest, eat, listen to feedback, or rest.
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