Commerce destroyer

Com´merce de`stroy´er

1.(Nav.) A very fast, unarmored, lightly armed vessel designed to capture or destroy merchant vessels of an enemy. Not being intended to fight, they may be improvised from fast passenger steamers.
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As the fateful date approached, airmen worked out the kinks in the Commerce Destroyers' new weapons systems and refined their skip bombing on the rusted-out hulk of a beached freighter.
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