follow-the-pointer indicator

follow-the-pointer indicator

[¦fäl·ōthə ¦pȯint·ər ′in·də‚kād·ər]
(ordnance)
Scale, on the mount of some types of artillery, that receives and registers firing data transmitted over a remote control system; the gun is kept properly aimed when its adjustment dials are matched with the readings on the indicator.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.