The Channel example shows the mature form of the doctrine. Starshell behind a radar-fixed enemy could silhouette German ships while making the area beyond the light seem darker to them. Destroyers attacking line abreast could use their radar to hold formation and aim, combining illumination with manoeuvre rather than treating darkness as an obstacle alone. British, Canadian, and Polish ships thereby used the contrast between light and darkness as a weapon against German forces interfering with the D-Day area.
Notable Point · 1:18:24-1:20:34
Turning starshell into concealment in the Channel
By 1944, British, Canadian, and Polish ships could use radar, line-abreast formations, and starshell to illuminate German forces while preserving their own concealment.