30 deg undershoot/overshoot is used in the US because it's roughly in the 30 deg latitude region. What is the rule of thumb formula for calculating the turn error for magnetic compass use in other latitudes?
30 deg undershoot/overshoot is used in the US because it's roughly in the 30 deg latitude region. What is the rule of thumb formula for calculating the turn error for magnetic compass use in other latitudes?
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