Geographic north

Geographic North
The direction toward the top point of the line about which the earth rotates (between Canada and Russia in the Arctic Ocean.) See also magnetic north.
Geographic Position ...

Geographic north. Toward the North Pole.
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 north - Geographic north, opposed to magnetic north.
trysail - A small sort of gaff sail or sharp headed sail set in heavy weather.

Compass rose A circle on a chart indicating the direction of geographic north and sometimes also magnetic north. Charts usually have more that one compass rose.

Magnetic north: The direction to the magnetic north pole, which does not match with the geographic North Pole
Magnetic variation: The variant angle of the difference between magnetic and geographic North Pole.

Geographical direction ignoring the earth's magnetic field and oriented toward the geographic North Pole and South Pole. Shown on the compass rose on a chart. Compare with magnetic direction.
true wind ...

true north: the geographic North Pole; the chart direction to the North Pole, where on a globe, the lines of longitude converge. true wind: the actual speed and direction of the wind felt when standing still.

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: North, Current, Course, Running, Line