True north

True North PoleThe north end of the earth's axis. Also called North Geographic Pole. The direction indicated by 000° (or 360°) on the true compass rose.
True WindThe actual direction from which the wind is blowing.

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

To find true north using a magnetic compass (one of the Four Great Inventions of ancient China, circa 300 A.D.), the local deviation (also called magnetic declination) must be known to adjust the reading.

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.

COMPASS ROSE: The resulting figure when the complete 360° directional system is developed as a circle with each degree graduated upon it, and with the 000° indicated as True North. True North is also known as true rose.

Magnetic north differs from true north because the magnetic fields of the planet are not exactly in line with the north and south poles. Observed differences between magnetic and true north is known as magnetic variation.

True bearing is the direction from the ship relating to true north with north being 0° and south 180° BELAY to temporarily secure a line without knotting by making one or more 'S' turns (varying somewhat with synthetic lines) around a cleat or pin ...

The angular difference between true north and the direction of magnetic north at a given point on earth; 2.

Compass -Navigation instrument, either magnetic (showing magnetic north) or gyro (showing true north).

True bearing: An absolute bearing (qv) using true north.
True north: The direction of the geographical North Pole.

The needle points to the magnetic North and not to the true North, the difference between them being called the variation of the compass, which differs widely in various parts of the world, being sometimes easterly and sometimes westerly, ...

True Bearing - Bearing relative to true north; compass bearing corrected for compass error.
True Heading - Heading relative to true north.

The Admiralty Chart is the gold standard, the true north, the understanding of centuries of navigational and hydrographical lore, distilled into two dimensions and six square feet.

The difference in degrees between true north and magnetic north. Variation varies from area to area and year to year. It is shown on a chart's compass rose. See compass.
veer ...

Magnetic variation. The difference between magnetic north and true north, measured as an angle. Magnetic variation is different in different locations, so the nearest compass rose to each location on a chart must be used.
Vector ...

Cardinal mark directions are divided into four quadrants based on True North (not Magnetic North) and the marks are named for the quadrant it represents: north, east, west, and south.

variation
Compass variable that accounts for the difference in degrees between true north and magnetic north.
ventilation
Air introduced into a spinning propeller from the water's surface.

The line around the earth where there is no magnetic deviation between magnetic north (as measured by a compass) and true north.
aground
When a boat is stranded on the shore, or on the bottom of the body of water, it is said to have run aground.

Variation - The difference between magnetic North and true North
Veer - A change of direction
Vertical Drive - Often used to describe the inboard outboard sterndrive ...

Navigation instrument, either magnetic (showing magnetic north) or gyroscopic (showing true north)
Course
The direction in which a boat is steered.

Trapeze: A device mostly used in racing dinghies to allow the crew to lean out further without falling overboard
True north: The direction to the geographic North Pole
True Wind: The wind that is felt by somebody stationary ...

It points to the true north, not the magnetic pole, and hence required no calculations for corrections. It is not affected by cargo or any type of magnetic field which may surround it and it is not disturbed by jars.

True Bearing - Bearing or direction taken relative to true North
Vertical Drive - often used to describe the inboard outboard sterndrive.
Wake - waves made by a boat's movement through the water.
( the disturbance your wife makes ...

See also: North, Wind, Boat, Navigation, Point