World War I accelerated fire-control experience

How much did naval fire control improve during World War I?

Massively, because large fleet movements and live firing produced operational experience that peacetime systems had lacked.

Operational experience drove fire-control improvements beyond the contribution of any single invention. World War I forced navies to coordinate large fleets, practice gunnery under operational conditions, and learn from repeated live firing. Those demands revealed weaknesses that peacetime trials could not fully reproduce. Progress depended on doctrine and training as well as instruments.