When did hull subdivision begin?
Short answerEarlier ships separated some internal spaces, but viable watertight subdivision began around the 1840s and evolved gradually into a systematic bulkhead arrangement.
NotesThe panel places the beginning of viable ship subdivision around the 1840s. Earlier ships already separated some spaces below decks, including magazines, but those arrangements were not yet a complete watertight system. HMS Warrior represents part of the transition toward more useful internal division. Strong bulkheads and deliberate compartment layouts then evolved incrementally rather than appearing in one decisive invention.