drift meter[′drift ‚mēd·ər]
An instrument for measuring drift angle. Also known as drift indicator; drift sight.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
An instrument that looks vertically at the surface to provide an indication of drift angle. It consists essentially of a sight tube with a hairline that is rotated until objects on the ground travel parallel to it. This direction is compared with the course to get the drift angle. Also called a drift meter or drift sight meter.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved