isogriv
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isogriv
[′ī·sə‚griv] (navigation)
A line drawn on a map or chart joining points of equal grivation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
isogriv
Isogrivs drawn on a lambert's projection.
A line drawn on a map or a chart joining points of equal grivation (i.e., the angular difference between grid and magnetic north).
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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