agonic line
The line around the earth where there is no magnetic deviation between magnetic north (as measured by a compass) and true north.
aground ...
Agonic Line:
Lines on the Earths surface joining point where there is no magnetic variation.
Aground:
When the hull or keel is touching or fast to the bottom of any body of water; on or onto the shore.
agonic line: An imaginary line on the earth's surface, along which there is no magnetic variation.
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CA ...
agonic line - An imaginary line (on the earth's surface) along which there is no magnetic variation.
aground - When the boat's keel or bottom is resting on the sea bottom.
ahead - In a forward direction; in advance of.
An agonic line of zero deviation currently runs through the Great Lakes region.
 See also: Apparent wind, Secure, Crew, Bend, Berth
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