Medicine: Up from the Bottom

Between hurricane warnings the morning was glassy calm and only faintly overcast as the submarine U.S.S. Archerfish hove to, 15 miles southwest of Key West, over Vestal Shoal. Flooding her tanks, Archerfish submerged and settled gently on the coral-sand bottom at 322 ft. On the surface, the submarine rescue ship Penguin maneuvered from a special mooring until she was directly over the sub, double-checking her position by UQC (underwater sound communication). Then Penguin lowered a diving bell. Of the four men who rode it down to 300 ft., only one was inside; three...

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