officer of the deck
officer of the deck definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
the officer in charge of a naval ship during a given watch
officer of the deck definition by American Heritage Dictionary
noun pl. officers of the deck
A naval officer assigned to represent the commanding officer of a vessel or installation for a specified period during which he or she is superior to all officers below the executive officer.