Turning the 4.7-inch mount into a true dual-purpose weapon

Which Royal Navy weapon mounting most needed redesign?

The 4.7-inch dual-purpose mount needed elevation of roughly 80-85 degrees to become an effective anti-aircraft weapon.

The British 4.7-inch dual-purpose mounting is the first redesign priority. Its surface-fire performance was useful, but limited elevation prevented it from becoming a fully effective anti-aircraft system. Raising the mounting to roughly 80 or 85 degrees would let the same gun engage high-angle targets. That change would give destroyers and other escorts a more credible heavy anti-aircraft battery without abandoning their established surface weapon. Mounting geometry, rather than calibre alone, is the decisive capability constraint.