lubber line

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lubber line

[′ləb·ər ‚līn]
(navigation)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

lubber line

lubber line
The reference line of a magnetic compass, directional gyro, or cathode-ray tube to indicate the nose of the aircraft. The heading is shown on the card or dial opposite the lubber line.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved