Which two naval technologies could be swapped in their dates of introduction to create the most cursed outcome?
Short answerIntroduce radar fire control before mature visual control and communications, encouraging dangerous fleet micromanagement from unreliable displays.
NotesSwapping radar and visual fire-control systems in time would be especially disruptive. Early radar would appear to offer day-and-night engagement before radios, plotting practice, and fleet command systems matured around it. Admirals might retreat into conning towers and attempt to micromanage formations from primitive displays. Flag signals and incomplete information would then turn apparent technical superiority into a command-and-control nightmare.