1. [Question] Were the exploders (devices used to initiate the explosion of the [torpedo] warhead) used in the torpedoes fired at the U.S.S. Indianapolis a German or a Japanese development?
[Answer] The exploders were Japanese-built, but Hashimoto did not know whether or not of German or Japanese design. (Description indicates this to be a copy of the German Pi 3).
2. [Question] If German, what was the German name for this exploder?
[Answer] No answer.
3. [Question] Was it necessary for these torpedoes to strike the ship in order for the exploder to function?
[Answer] Impact is not necessary for the exploder to function.
4. [Question] If not, how far below the keel of the ship could the torpedo pass and still fire?
[Answer] The torpedo could pass below the ship a maximum of 4 meters and still fire.
5. [Question] Were your instructions for depth setting on torpedoes carrying a magnetic exploder the same as those for torpedoes carrying a contact exploder only?
[Answer] No, the instructions were different. Magnetics were fired on deeper settings.
6. [Question] Is it true that the torpedoes fired at the U.S.S. Indianapolis carried exploders that were actuated by the magnetic field of the ship?
[Answer] Yes.
7. [Question] When you fired these torpedoes did you choose a depth setting which would permit the exploders to operate magnetically?
[Answer] According to Hashimoto there was no time to make a more suitable setting. Consequently it was left as it was, at 4 meters.
8. [Question] Did the torpedoes carry a mechanical exploder which would operate on contact with the ship as well as the magnetic exploder?
[Answer] The torpedoes carried combination magnetic and impact exploders.