Search didn't show much about this. As in our time line the ships are detected. Instead of launching the raid, they head a different direction and let the alert die down. Planes launch 3 days later from the planned distance ( I want to say 600 miles) undetected. Would more of the Mitchell's make their landing fields in China? I would presume that even though the raid was detected, would the Japanese defenses still be at a higher alert level? How long would they keep it. They might think, OK the Yankees were detected and nothing happened. Maybe the Yankees went home.
Enquiring Minds Want to Know .
docfl