coefficient B[¦kō·ə′fish·ənt ′bē]
A component of magnetic compass deviation, varying with the sine function of the compass heading, resulting from the fore-and-aft component of the craft's permanent magnetic field and induced magnetism in unsymmetrical vertical iron forward or aft of the compass.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The coefficient of semicircular compass deviation caused by magnetism in the body of the carrying aircraft along its longitudinal axis. Its value is maximum on easterly and westerly headings. Coefficient B = ¼(Deviation on magnetic East − Deviation on magnetic West).
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved