diving rudder

diving rudder

[′dīv·iŋ ‚rəd·ər]
(naval architecture)
One of the movable plane surfaces attached to the hull of a submarine that control the vertical motion of a submarine. Also known as diving plane; hydroplane.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in classic literature ?
She was just in time to see Benson at the diving rudders. When he saw her, he raised his pistol and fired point-blank at her, but he missed and she fired--and didn't miss.