off-carriage fire control

off-carriage fire control

[′ȯf ‚kar·ij ′fīr kən‚trōl]
(ordnance)
Process of controlling fire on a target with the aid of a sighting device which is not mounted directly on the weapon.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.