Last Updated：2025/11/25

(cartography, navigation) A line on a chart or map joining points of zero magnetic declination.

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agonic line

Source Word

agonic line

(cartography, navigation) A line on a chart or map joining points of zero magnetic declination.

Japanese Meaning

磁偏角がゼロになる地点を結んだ線

When plotting the ship's course, the navigator marked the agonic line to avoid relying on magnetic bearings.

航路を作図する際、航海士は磁気偏角がゼロの線を示して磁気方位に頼らないようにした。

Sense（1）

(cartography, navigation) A line on a chart or map joining points of zero magnetic declination.

agonic lines

（ plural ）