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third mate

the officer of a merchant vessel next in command beneath the second mate.
Also called third officer. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Historical Examples
  • This set everybody in motion, and the captain and third-mate were on deck in a minute.

    Afloat And Ashore James Fenimore Cooper
  • As third-mate, it was my duty to see the boxes taken out of the hold, and the opium delivered.

    Ned Myers James Fenimore Cooper

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