magnetic north - The direction to which a compass points. Magnetic north differs from true north because the magnetic fields of the planet are not exactly in line with the north and south poles.
Magnetic North: The direction a compass needle points when there are no local disturbing influences [deviation].
Mainsail: The sail hoisted on the after side of the mainmast, pronounced "mains'l."
Make Fast: Action of attaching a line.
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.
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.
come up into the wind To steer the boat in the direction that the wind is blowing companionway A staircase to a cabin or area below deck compass A magnetic needle, attached to a compass card, that tends to point toward magnetic north ...
A true bearing is one expressed in degrees relative to true north; a magnetic bearing is one expressed in degrees relative to magnetic north.
deviationThe amount of error from displaying magnetic north in a boat's compass caused by the boat's own magnetic interference.
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, ...
Magnetic Bearing - Bearing relative to magnetic north; compass bearing corrected for deviation.
true north - Geographic north, opposed to magnetic north.
trysail - A small sort of gaff sail or sharp headed sail set in heavy weather.
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 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.
v-berth ...
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 ...
Compass: An instrument that uses the earth's magnetic field to point to the direction of the magnetic North Pole; used by navigators to determine the direction a yacht is heading and to set a course.
Course: The direction a yacht is sailing.
Navigation instrument, either magnetic (showing magnetic north) or gyroscopic (showing true north)
Course
The direction in which a boat is steered.
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 - The difference between magnetic North and true North
Veer - A change of direction
Vertical Drive - Often used to describe the inboard outboard sterndrive ...
COMPASS - Instrument using the earth's magneting field to point to the direction to the magnetic north pole.
COURSE - The direction in which a boat is steered.
CROWN - Bottom part of anchor.
CUDDY - A small shelter cabin in a boat.
Compass:
Navigation instrument, either magnetic, containing a magnetized card indicating the direction to magnetic north (showing magnetic north) or gyro (showing true north).
Azimuth compass - An instrument employed for ascertaining position of the sun with respect to magnetic north. The azimuth of an object is its bearing from the observer measured as an angle clockwise from true north.
 See also: North, Line, Boat, Chart, Compass
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