Why concentrated naval fire requires practice

Why was concentrating fire on one target a problem?

It required practiced coordination so each ship could identify its own fall of shot; Beatty's force lacked enough joint gunnery training.

Multiple ships can engage one target effectively only when their fire-control teams understand the shared procedure. Each ship must distinguish its own shell splashes from those produced by its partners and adjust from the correct fall of shot. The Grand Fleet practiced this method, and Ajax and Achilles at the River Plate provide another example of coordinated concentration. Beatty's battlecruiser force did not train together enough. Tiger consequently mistook Lion's splashes for her own and corrected against the wrong information. Gunnery accuracy depended on collective training as well as equipment.