Centerboard
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centerboard
[′sen·tər‚bȯrd] (naval architecture)
A metal or wooden slab in a casing along the centerline of a sailboat which may be lowered to increase the boat's resistance to lateral motion, and raised when the boat is in shallow water or is beached.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
Centerboard
a retractable keel made of metal sheet or, less often, wood, used on small sailing vessels, such as yachts; its primary function is to increase resistance to leeway. The center-board can be retracted into a watertight slot for sailing in shallow waters.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.