Immediately after Jutland, Jellicoe pressed industry and officials for improved night vision, rangefinders, ammunition, and illumination. Searchlights could reveal an enemy, but their beams also marked the emitting ship for destroyers. The requirement was effectively for starshell before a mature starshell system existed. A battlefield lesson had become a set of technical requirements for interwar gunnery development.
Chapter · 1:02:12-1:04:20
Jellicoe wanted illumination without advertising the firing ship
Jutland drove demands for better low-light optics, rangefinding, shells, and a way to illuminate targets without presenting a searchlight as a torpedo aim point.