An isolated ship needs defensive fire to influence aircrews before they enter their attack run; a powerful close-range kill zone comes too late for that purpose. Without fighters or a wider formation, HMS Cornwall and HMS Dorsetshire had to rely on 4-inch guns and pom-poms. Cornwall's Mark I 8-inch mounting could attempt high-angle fire, whereas Dorsetshire's Mark II could not, leaving the pair differently equipped at the outer edge of their gun defence. Bofors reach might have moved visible defensive fire farther out and increased psychological pressure. In this assessment, different 40 mm mounts would not have reversed the cruisers' loss. Both ships had been designed to operate within a fleet system and were caught without it.
Notable Point · 1:12:28-1:15:53
The Indian Ocean shows why isolated ships valued Bofors reach
Without fighters and a fleet's layered screen, Cornwall and Dorsetshire lacked time to disrupt Japanese attackers before pom-pom fire became lethal.