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mariner's compassNavigational magnetic compass usually consisting of a pivoted compass card & magnet needle and with 8, 16, or 32 equal divisions, set in a gimbal-mounted nonferrous metal bowl.
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mariner's compassCompass used for directing course of a ship. The card, or 'fly', is mounted in a ballasted bowl fitted with a lubber line or pointer that coincides with ship's fore and aft line;
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