Glossary
Hypothermia- The lowering of your core body temperature, reaching a subnormal temperature of the body.
Jib Halyard- Controls jib luff tension. Jib Leads- Controls jib leech and foot tension.
Land Effects- Wind conditions that are affected by nearby land features such as: islands, tall buildings, or even anchored ships.
Lateral Markers- The red and green buoys or daymarks that identify the sides of channels.
Lee Helm- The boat’s tendency to turn to leeward caused by too little force in the mainsail combined with too much weight on the windward side, mostly in light winds.
Lift- The wind’s direction shifts from bow toward the stern.
Lull- A brief decrease in the wind.
Navigation Aids- Fixed objects, such as buoys and lighthouses, used for navigation.
Non-lateral Markers- The regulatory or informational markers used to advise you of situations, dangers, or directions.
Puff- A brief increase in the wind.
Reefing- The act of reducing the area of the mainsail by lowering the sail partially and securing the lower portion to the boom.
Rode- Another name for anchor line.
Roll Jibe- A faster paced jibe, allowing for less time with the mainsail in transition from one tack to the other while minimizing use of the rudder.
Tide- The vertical movement of water caused by the gravitational pull of the Earth and the Moon.
Traveler- A control used to adjust the location of the boom relative to the centerline of the boat and the angle of the mainsheet to the wind; usu- ally adjusted by a car on a track at the stern of the boat.
True Wind- An accurate reading of the winds direction and velocity from a stationary point.
Turtled Boat- When a boat has capsized and turned completely upside down.
Twist- The curvature of the leech, most notice- ably near the top batten.
Roll Tacking- A faster-paced tack to improve acceleration once the boat has passed through the No-Go Zone.
Rules of the Road- Boats are obligated to respect the navigation rules.
Sculling- The act of moving the tiller and rudder repeatedly back and forth.
Slack- The period in between, with very little water movement.
Stand-on Vessel- The boat that should maintain course and speed.
Stratus Clouds- Low layer of clouds; indicator of steady rain.
Thermal Winds- As denser cool air is drawn toward rising warm air, wind is created. These winds are also known as “onshore breezes” or “sea breezes.”
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