[KongchangAI]
Unverified80% confidenceDecision RuleTime unknown

北半球中高纬度地区(如北美、北欧)使用时需选带偏角修正(declination adjustment)的型号,磁偏角超过±10°会导致直线导航累积偏差;中国大部分地区磁偏角在±6°内,普通款可手动换算

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80%
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Long-term
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