[CCIP]

Again, that's only a success assuming reliable radar information they could actually trust, the Japanese behaving exactly as expected, scout planes finding the Japanese fleet at exactly the right time AND not provoking an immediate defensive reaction from them, and everything else working perfectly. But I'd give it something like a 1% chance of actually succeeding.

In that sense, I think disrupting their attack plan, moving the fleet, sending submarines to try and pick off the carriers would probably be a much better way of giving the Japanese war plans a headache. The Americans didn't really need such a total success to make life more difficult just for the enemy - being able to constrain their total freedom of movement in the first few months of the war (even by making them waste resources keeping their main fleet constantly ready for that Mahanian decisive line battle) would be more than enough.