All I'm seeing is people trying to derail the thread with "HURR IMMA MAKE SPESHUL TECH" fantasies and trying to railroad OP into doing so.
This is an absolutely BASED evisceration of thread derailers.
The thing is, since its fairly obvious that Thompson knows things he shouldn't, if not outright fully outted by now, he WILL be asked a very wide range of questions.
There is a reason its called 'pick away at their brain'. They will ask all kinds of questions about damn near every single topic that they can imagine. If you've ever had to been through in-depth questioning by the police or a lawyer, those are kiddie grade quizzes compared to FBI/CIA/ONI/NSA/etc stuff.
So what is he can't give them e=mc^2 grade stuff, or tell them that the 7th screw on item X caused a promising turbine to fail & wasn't spotted until years later. If he can, more power to his memory (and may he suggest Jeopardy 40 years ahead of schedule). If he can't, well,
he can't. And they'd be fully aware that they're asking the impossible for him to remember everything.
They'll still ask. It'd be dereliction of duty for them NOT to ask, even if they are fully aware many answers will boil down to, 'I don't know'.
For everything
else that he
faintly recalls, even fragments will at least point in the right direction(s). It might not,
and never, help for THIS war, but getting a minor clue that snowballs as people start looking at the areas he mentioned, might allow for post-war leaps by perhaps 1-6
months early.
The torpedo issue though is extemely well known to any Pacific theater WW2 naval historian, and one answer that can & will work, is to mention what that sub commander did: yank the mag detector, and they worked just fine. It was squashed by Adm. Christie who ordered it put back in (which then immediately made them not work until 1943 iirc finally gave them the fix needed), but its a quick 'dumb' fix that can work.
A step BACK, instead of a step forward.
The fix for air-dropped torpedoes though is likely beyond him. He might clue them in and point them roughly towards getting the fix out a month or so earlier than IRL's fix, which gives the same/identical results of his OTL's fix. No more, and no earlier.
Asking for anything more involving technology, is hilariously OP and unrealistic in the extreme.
Tactics though? Well, he 'invented' the Thompson Weave (which, now that he's been outted, he might demand is retconned to be named after it's original creator, CMDR Thatch). So on that front, he'd be utterly invaluable. Especially once kanmusu start showing up more, as he would be fully knowledgeable as to how best to utilize warships condensed down into the form of a young woman, rather than having everyone stumble through inventing tactics.
Again, kanmusu tactics won't really help in this war, outside of Thompson's worst nightmare of kanmusu vs kanmusu that may occur, but would very likely shave off years of bloody, painful, learning, with a cost of hundreds of flag-draped coffins, that was required to get that experience against Abyssals.
