Royal Navy thinking moved away from treating the conning tower as an armoured space able to resist equivalent enemy fire. Later designs made it a hardened position that offered some protection instead. A modern combat information centre can receive a battle picture through sensors and displays when combat occurs beyond visual range. At close range, direct sight still matters. A television example, tentatively identified as HMS Northumberland, shows a Type 23 frigate's team on the bridge during an encounter with a Russian spy ship. Early twentieth-century ships depended even more heavily on the human eye, so an enclosed armoured box could obstruct the command work it was meant to protect. The idea sounded persuasive as a Victorian promise to shield senior officers, but it worked poorly when they needed an unobstructed view.
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Why armoured conning towers lost their appeal
Royal Navy conning towers increasingly became hardened positions instead of heavily armoured command centres because close fighting depended on what officers could see.