How the G3 torpedo defence might have worked

How did the G3 torpedo-defence system compare with the Iowa class?

Its adaptable void-and-liquid layers looked promising, but the unbuilt system was never combat-tested, so its real superiority cannot be known.

The G3 torpedo defence placed an outer air space ahead of a liquid-filled space intended to absorb and manage an underwater explosion. If the outer space flooded, the liquid layer could be emptied to restore a void deeper inside the defence. The arrangement looked promising beside Iowa's underwater protection. No G3 was built or tested in combat, however, so drawings cannot establish how workmanship, damage control, and repeated hits would have affected performance. The comparison remains informed but inconclusive.