Could warning have turned Pearl Harbor into an ambush?

The Pearl Harbor proposal asks whether the attack could have become a missed opportunity for the United States as well as a Japanese success. The scenario depends on detecting the approaching Japanese force through intelligence, maritime patrol, submarines, or other reconnaissance. Sufficient warning would let land-based aircraft, carriers, and battleships prepare a coordinated ambush. It imagines major losses to the Kido Butai, the Kongō-class battleships, and accompanying cruisers. This is explicitly counterfactual and tests how surveillance and warning time might alter the balance before an attack.