Japan with Habakkuk plans and the problem of recognizing an air raid

What if Japan obtained Habakkuk documentation in 1935?

The answer imagines an attempt to build it and a much larger bomber threat, then questions how defenders would interpret the radar warning.

The question gives Japan Habakkuk documentation in 1935. The reply thinks Japan would try to build the enormous carrier and imagines land-based bombers appearing off an enemy coast. Its size and the number of aircraft raise questions about detection. The discussion then considers whether an extraordinary radar return would be reported or dismissed as a fault. It uses the scenario to distinguish seeing a signal from recognizing its military significance, without resolving how the imagined ship would actually be built or supported.