Z Batteries make more sense over fixed routes

Passionate advocates can drive a project forward, but enthusiasm can also compromise the scientific method. Reports that some testing and development results were fixed leave the Z Battery's evaluation uncertain. A rocket barrage nevertheless made more sense where aircraft were likely to funnel along an estuary, river, or other navigational feature toward a fixed target. Merseyside illustrates the logic because night bombers could use the river as a guide toward an industrial area. Defenders could launch into that predictable corridor without having their protected position sail away from the barrage. The land weapon's photoelectric proximity-fuzed high-explosive payload was a better fit for aerial-minefield logic, although plausible geography alone does not establish its wartime value.