An alarm bell woke Gretton, sleeping after the night’s work, and, at 07:30, one minute after the torpedo struck, he ordered the next WATU-coined manoeuvre of the journey: Artichoke. As one destroyer powered at maximum ASDIC speed toward the wounded ship, all others in the escort turned outward and performed a fifteen-knot sweep in line. U-258 managed to slip away. The McKeesport, listing to one side, managed to maintain convoy speed for almost fifty minutes while taking water, before the order was finally given to abandon ship at 08:15. The sixty-eight men on board were picked up by the crew
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