Last Updated
：2025/11/21
compass error
Noun
Japanese Meaning
磁気コンパスが示す方向と真北との間に生じる水平角の誤差。これは、磁気偏角（地磁気による真北と磁北の差）と磁気偏向（局所的な磁場の影響による誤差）が合わされたものである。 / 地磁気と周囲の磁界の影響により、コンパスが指し示す方向が真北からずれる現象を指す。
（ plural ）
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(geometry, geomagnetism) The combination of variation and deviation which is the horizontal angle between the direction indicated by a magnetic compass and true north.
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compass error
Before setting the course, the navigator checked the compass error and adjusted the heading to compensate for the difference from true north.
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Before setting the course, the navigator checked the compass error and adjusted the heading to compensate for the difference from true north.
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