Britain produced four 16-inch Mark II guns and could conceivably have continued toward a full eight-gun set for Vanguard. The design fired a shell weighing roughly 1,077 kilograms. Nelson and Rodney required eighteen barrels between them, but the Royal Navy manufactured twenty-nine. Those spares show how barrel wear, refitting, and long-term readiness shaped the true cost of keeping a battleship battery operational. Gun design depended on industrial support long after the ship entered service.
Notable Point · 1:53:40-1:55:28
Britain had the beginnings of a 16-inch Mark II battery for Vanguard
Four completed 16-inch Mark II guns suggest an alternative Vanguard armament, while Nelson-class spare-barrel numbers reveal the maintenance burden behind capital-ship gunnery.