TRUE WIND: The actual direction from which the wind is blowing.
TURNBUCKLE: A threaded, adjustable rigging fitting, used for stays, lifelines and sometimes other rigging.
U
UNDERWAY: Vessel in motion, i.e., when not moored, at anchor, or aground.
true wind
Direction and velocity of wind as measured on land, distinct from apparent wind.
T-top
Short, aluminum tower with overhead canvas to protect the helm.
true wind - The speed and direction of the wind. The motion of a boat will cause the wind to appear to be coming at a different direction and speed, which is known as apparent wind ...
True wind
The strength and direction of the actual wind blowing. While sailing, the true wind is never felt - it is always a combination of the true wind, and the boat's speed (called the apparent wind), ...
TRUE WIND: The actual direction from which the wind is blowing.
TUMBLE HOME: Refers to a cabin or hull with a width that becomes narrower as height increases.
true wind - The actual wind direction and force, different than the apparent wind.
tumblehome - The inward curving of the topsides (above the waterline).
true wind
The actual direction and strength of wind, as felt on a boat that is not moving. Compare with apparent wind.
trunk ...
As the true wind moves further aft, the apparent wind decreases in speed.
true wind: the actual speed and direction of the wind felt when standing still. tuck: in knot tying, to insert the end of a line between two other lines or between two parts of the same line.
It is important to keep the boat relatively flat, and with the true wind at 12 knots, we were pushing 8 knots. As mentioned earlier, the class rules allow for two chutes and we had the small one aboard. Set from the retractable sprit, the No.
On board a moving boat you feel the apparent wind, which is different than the true wind that acts on stationary objects. When running with light winds, the apparent wind may be close to zero.
The combination of the true wind and the wind caused by the boat's own speed. This is the wind felt on the boat, as well as the one shown by the telltales.
arc of visibility ...
Advantage Line: An imaginary line drawn perpendicular to the true wind direction across the bow of the leading yacht. Wind shifts may cause the advantage line to swap between yachts.
Aft: Toward the stern of the boat.
If you draw a line through your vessel 90 degrees to the direction of the true wind (not usually the "relative" wind that you feel while your boat is moving), ...
The apparent direction of the wind, which is affected by a boat's motion. The apparent wind is only the same as the true wind if the boat is stopped.
Astern
Toward the stern of a vessel, or behind the boat.
Apparent Wind:
The direction and speed of the wind as it appears to those on board, relative to the speed and direction of the boat; combination of the true wind and the wind caused by the boat's movement through the water.
Do not necessarily try to go dead downwind, but if you do, you probably want to be under jib or genoa only. A more efficient point of sail is between 120¾ and 150¾ at which you should sail at a speed of about 50% of the true wind.
Trim: To adjust the sails to make the most of the wind.
Trimaran: A three hulled boat with a main hull and two smaller outrigger hulls.
True wind: The actual direction from which the wind is blowing.
Trunk: A chamber that houses a boats centerboard.
The direction indicated by 000° (or 360°) on the true compass rose.
TRUE WIND - The actual direction from which the wind is blowing.
TURNBUCKLE - A threaded, adjustable rigging fitting, used for stays, lifelines and sometimes other rigging.
True wind: The actual direction from which the wind is blowing.
Tuning - the adjustment of the standing rigging, the sails and the hull to balance the boat for optimum performance ...
Apparent wind: The subjective wind that results from true wind and the wind produced by motion
Astern: in backward direction; back; abaft the stern
Athwartships: in a 90 degree angle to the centerline of the vessel ...
trick A period of duty at the helm trim To adjust angle of the sails to accord with the wind true north The geographic North Pole true wind The actual speed and direction of the wind felt when standing still turnbuckle A fitting ...
 See also: Forward, Boat, Wind, Hull, Rudder
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