How good was the Illustrious class's torpedo protection compared with its resistance to kamikaze attack?
Short answerThe class had serious subdivision, heavy bulkheads, and a dedicated torpedo-defence system, probably similar in principle to that of the King George V class.
NotesThe Illustrious class had substantial subdivision and heavy bulkheads in addition to a torpedo-defence system. The arrangement was probably comparable to the King George V design, although the missing diagram prevents a more exact comparison. The exchange establishes the protective principles without pretending to resolve every structural detail. It also separates flight-deck protection from underwater survivability.