Did the Imperial Japanese Navy obtain N3 plans, given the resemblance in later tower structures?
Short answerSimilar solutions to similar problems are the suggested explanation; access to N3's plans is not established.
NotesSimilar requirements could explain the resemblance between Japanese towers and N3's superstructure. The forms are not identical, and Nelson and Rodney provide another British comparison. Japanese access to the British plans remains unestablished. Resemblance alone is insufficient to show a design transfer.