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WIND.md

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Wind

Vocabulary (by relevance, not alphabetical)

True Wind


The wind as observed at a stationary point. Example: A flag on a pole flies in response to the true wind.

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Boat Wind


The wind effect caused by the motion of the boat.

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Apparent Wind


It's what we feel on our moving boat and it's how the air strikes our sails. Our wind indicator at the top of the mast always points into the apparent wind.

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Luff


When sails experience close to no apparent wind and thus flap around.

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Beam


Measurement of the greatest width of the boat.

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Length Overall (LOA)


Measurement of the greatest length of the boat.

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Mast Height


Distance from the water line to the top of the mast (including instruments and VHF antenna).

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Freeboard


Part of boat that is between 'Top of Deck' and 'Waterline'.

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Draft


Part of boat that is between 'Waterline' and the bottom of the 'Keel'.

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Starboard


Right side of the vessel.

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Port


Left side of the vessel. (Hint: Both 'Left' and 'Port' have 4 letters.)

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Abeam


The direction at a right angle to the boat's 'Keel'.

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Ahead


In front of the boat.

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Astern


Behind the boat.

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Aft


Movement at or towards the 'stern'.

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Forward


Movement at or towards the 'bow'.

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Athwartship


Movement across a boat from side to side.

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Windward


The side of the boat closer to the wind.

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Leeward


The side of the boat further from the wind.

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Head/Come Up


Steering the bow of the boat more upwind. The sails should be trimmed in when turning the boat toward the wind.

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Bear Away/Fall Off


Steering the bow of the boat more downwind. The sails should be eased out when turning the boat away from the wind.

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Weather Helm


The tendency to head up is called weather helm.

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Lee Helm


The tendency to bear away is called lee helm.

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(Port/Starboard) Tack (noun)


Wind coming over the port or starboard side of the vessel.

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