compass card


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compass card

[′käm·pəs ‚kärd]
(design engineering)
The part of a compass on which the direction graduations are placed, it is usually in the form of a thin disk or annulus graduated in degrees, clockwise from 0° at the reference direction to 360°, and sometimes also in compass points.

compass card

compass card
A drumlike scale, marked in degrees from 001° to 360°, fastened around the float in an aircraft magnetic compass.
References in periodicals archive ?
As I went to pull out the checklist, my pilot told me the compass card was spinning freely, ratcheting, and randomly reversing direction of spin.
Construction includes a high-impact composite outer case, 25X optical glass magnifying crystal, and a Mylar compass card seated on a tiny sapphire bearing that will never wear out Waterproof, weatherproof and highly shock resistant, the unit is specified to work from n40-degrees F.
states that "they should be able to sell 4,000 smsComet and Compass Cards per month.
Thanks to less-than-adequate instrument lighting, I barely could read my BDHI compass card and couldn't see the DME.