Picture of dramatic sinking of USS ARIZONA, with the loss of 1,177 lives, during the Japanese attack on Pearl Harbor on 7 December 1941, the event that brought about U.S. involvement in World War II. The picture is taken looking from the side of the USS Arizona. To the left you can Number Two 14″/45 triple gun turret pointing forward. The supporting structure for the gun director tripod has collapsed and the tripod is tilting forward towards the front of the ship giving the wreck its distinctive appearance.
At 08:06 a bomb from a Hiryu Kate hit between and to starboard of Turrets #1 & 2. The subsequent explosion which destroyed the forward part of Arizona was due to the detonation of the ammunition magazine, located in an armored section under the deck. Most experts seem to agree that the bomb could hardly have pierced the armor. Instead, it seems widely accepted that the black powder magazine (used for aircraft catapults) detonated first, igniting the smokeless powder magazine (used for the ship’s main armament).
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Source: Naval archives