Definition of compass card in English:

Share this entry

compass card


A circular rotating card showing the 32 principal bearings, forming the indicator of a magnetic compass.
Example sentences
  • Compass makers compensate for dip error by intentionally unbalancing the compass card / magnet assembly to the degree needed to provide optimum accuracy in a range of latitudes.
  • Thanks to less-than-adequate instrument lighting, I barely could read my BDHI compass card and couldn't see the DME.
  • It can be used to determine if DC current is flowing in a circuit by moving it up against one of the two wires in a circuit and watching for a movement of the compass card.
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.