How long would German naval industry have needed to recover?

How long would it have taken German naval industry to recover if the Second World War had not begun?

Plan Z aimed optimistically at 1945, with around 1950 considered more realistic. Restoring the required industrial base would have taken years even without the war.

Plan Z depended on rebuilding industry as well as constructing ships. Its most optimistic delivery horizon was 1945, while about 1950 is judged more realistic. Germany had begun its major expansion only a few years before the war. Restoring the fleet and its supporting maritime industry after roughly eighteen years of restrictions could not be completed in that interval.