PPRuNe Forums - View Single Post - Compass card-why bother?
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Old 19th Jun 2006, 23:36
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rjt194
 
Join Date: Mar 2005
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My understanding is that it was invented as a result of the ironclads. Before that ships were all wood (albeit with iron nails and guns), so the effect on the compass was minimal - or could be dealt with easily using a deviation card
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