IJN Carrier Wreckage- Identification Analysis
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Executive Brief

This analysis was undertaken to help ascertain the point of origin of a piece of wreckage recently discovered by Nauticos. It is believed that this artifact originated from a Japanese aircraft carrier sunk at the Battle of Midway. In order to help identify the artifact’s origin, a thorough examination of each of the three carriers believed sunk in the general vicinity of the wreckage find—the Akagi, Kaga, and Sôryû—was undertaken to correlate the undersea photographic evidence with known characteristics of these three warships. Extensive usage was made of both English-language and Japanese sources in support of this effort.

The results of the analysis demonstrate conclusively that the wreckage originated from the Japanese aircraft carrier Kaga. Specifically, it is composed of two 25mm anti-aircraft gun tubs, and their associated gallery structures, that were located on the forward end of the starboard aft (starboard quarter) machine gun gallery of the vessel.

The second portion of the analysis, which deals with the circumstances surrounding how and when the wreckage was created, is less conclusive. The gaps in the historic record concerning Kaga’s demise are large, and it is impossible to pinpoint the exact time when the wreckage may have broken off from the ship. Nevertheless, we believe that the event probably occurred sometime between U.S.S. Nautilus’ attack on the ship (at 1400), and her abandonment at 1640.
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