The Agony of the Indianapolis (August/September 1982 | Volume: 33, Issue: 5)

The Agony of the Indianapolis

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Authors: Kenneth E. Ethridge

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August/September 1982 | Volume 33, Issue 5

On July 16, 1945, the heavy cruiser Indianapolis departed the California coast for the Pacific island of Tinian. On board was a heavily guarded top-secret cargo destined to end the war. Only hours before the Indianapolis began her high-speed journey, the first successful atomic detonation had ushered in the nuclear age. The cruiser itself carried vital elements of the atomic bomb that would be dropped on Hiroshima. Even Captain Charles B. McVay III, in command since November 1944, did not know the contents of his mysterious shipment. He had been assured, however, that every hour he cut from travel time would shorten the war. Captain McVay took this admonition seriously, and the vessel made the five-thousand-mile voyage in only ten days.

After delivering her lethal cargo to the American base at Tinian on July 26, the Indianapolis proceeded to Guam and prepared for the final leg of her voyage across the Pacific to the Philippine island of Leyte. There the ship was to complete two weeks of training in preparation for joining Naval Task Force 95 at Okinawa, where plans were under way for the expected invasion of Honshū in November of 1945.

While at Guam, Captain McVay inquired about an escort for his ship to the Philippines; naval headquarters replied that none was needed. The response was not considered unusual: the Indianapolis was a fast cruiser and had traveled alone before; she would be sailing through a rear area where danger was considered minimal; and in any event, escort vessels were scarce, due to heavy kamikaze attacks at Okinawa and the extensive preparations for the invasion of Japan. On the other hand, the cruiser had no sonar gear to detect enemy submarines; she had to rely solely on radar and lookouts. And during a recent inspection, Admiral Raymond Spruance had warned that were the ship torpedoed, her “topheaviness” would make her “sink in short order.” The Indianapolis left Guam on July 28. She was due to dock at Leyte July 31.

On Sunday evening, July 29, the Indianapolis was traveling at seventeen knots through the Philippine Sea, thirty-nine hours out of Guam. The day had been overcast, and by evening the sea had become rough. Just before 8:00 P.M. Captain McVay instructed the officer of the deck, Lieutenant Charles B. McKissick, to cease the zigzag course the ship was maintaining, because of poor visibility. Although zigzagging was of dubious value—many submariners claimed a ship could be sunk despite it—standing fleet orders specified that a ship should zigzag during good visibility. Usually, zigzagging ended at twilight “except on clear nights and in bright moonlight.” Lieutenant McKissick thought nothing unusual of the captain’s order; he too believed visibility was limited. When Mc Vay retired to his emergency bunk twenty feet from the bridge at 11:00 P.M. , he noted that visibility was still poor despite the moonrise.