outer keel

outer keel

[′au̇d·ər ′kēl]
(naval architecture)
The outer plate of a double flat-plate keel.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Carried only by the males, the horns twist around an outer keel, reaching two complete turns at maturity.
The ballast was recast into six 10,000-pound 11-footlong ingots, which were bolted to the bottom of the outer keel. The wooden keel had already been extended to accept the external ballast, he said.