A circular rotating card showing the 32 principal bearings, forming the indicator of a magnetic compass.
罗经卡，罗经刻度盘
Example sentencesExamples
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.
The revolving compass card had jammed onto the needle when under pressure, preventing it from swinging freely.
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.
Definition of compass card in US English:
compass card
nounˈkəmpəs kärd
A circular rotating card showing the 32 principal bearings, forming the indicator of a magnetic compass.
罗经卡，罗经刻度盘
Example sentencesExamples
Thanks to less-than-adequate instrument lighting, I barely could read my BDHI compass card and couldn't see the DME.
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.
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.
The revolving compass card had jammed onto the needle when under pressure, preventing it from swinging freely.