compass deviation card

compass deviation card
a card, sheet, or the like, with two compass roses printed on it concentrically, for recording, on a given voyage, the amount of deviation for which the navigator must compensate in using the ship's compass to steer a magnetic course.

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Universalium. 2010.

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  • compass deviation card — a card, sheet, or the like, with two compass roses printed on it concentrically, for recording, on a given voyage, the amount of deviation for which the navigator must compensate in using the ship s compass to steer a magnetic course …   Useful english dictionary

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  • compass card — A drumlike scale, marked in degrees from 001° to 360°, fastened around the float in an aircraft magnetic compass. Compass correction/deviation card …   Aviation dictionary

  • magnetic deviation — The angular difference between the magnetic heading and the compass heading, expressed in degrees east or west to indicate in which direction the end of the compass heading is offset from the magnetic heading. It is one of the errors in a… …   Aviation dictionary

  • compass — compassable, adj. compassless, adj. /kum peuhs/, n. 1. an instrument for determining directions, as by means of a freely rotating magnetized needle that indicates magnetic north. 2. the enclosing line or limits of any area; perimeter: You can… …   Universalium

  • calibration card — A card indicating instrument error and usually displayed near the instrument. It gives the corrected value of the instrument indicated reading. In some cases, the correction to be applied to the indicated reading instrument to get the correct… …   Aviation dictionary

  • Magnetic declination — Example of magnetic declination showing a compass needle with a positive (or easterly ) variation from geographic north. Magnetic declination is the angle between magnetic north (the direction the north end of a compass needle points) and true… …   Wikipedia

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