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coastal refraction[′kōs·təl ri′frak·shən]
An apparent change in the direction of travel of a radio wave when it crosses a shoreline obliquely. Also known as land effect.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
land effect, shoreline effect, and shoulder effect. This effect can be minimized by use of coastal beacons, in which the radio beam will leave the coast at 90°, resulting in nil refraction.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved