Definition 1 of 2
Plain English Meaning
A pair of small electrical units that copy angle from one place to another. One unit measures how something is turned, and the other unit turns to match, so a sensor mounted somewhere out in the airframe can drive a gauge in the cockpit.
Full Definition
An electrical device that transmits angular position or rotation from one shaft to another remotely, using paired transmitter and receiver units connected by wires. The transmitter senses the angle of an input shaft and sends an electrical signal that causes the receiver to rotate to the same angle, allowing a remote sensor's reading to be displayed accurately on a cockpit instrument.
Context Anchor
Seen in discussions of remote compass and , especially where information is sent electrically to an instrument .