An armoured conning tower can shelter the command team during close-range fighting. Its protection matters only if the commander directs the battle from inside the enclosed position. A captain who remains elsewhere gains none of that benefit. The ship still pays the tower's weight and space costs, so command practice determines whether the armour is useful.
Notable Point · 38:38-38:52
Conning-tower armour only helps if commanders use it
An armoured conning tower is useful in close fighting only when command practice puts the captain inside it.