officer of the deck
a naval duty officer responsible for the operation of the ship in the absence of the captain or the executive officer. Abbreviation: O.O.D.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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Historical Examples of officer of the deck
The officer-of-the-deck is in charge of the ship as the representative of the captain.The Armed Forces Officer
U. S. Department of Defense