Reading a navy's expected battle from its secondary battery

A heavy secondary battery suggests that designers expect significant cruiser support around opposing battleships. A lighter battery implies that main guns will handle large targets while secondaries suppress destroyers and torpedo boats. Calibre therefore offers evidence about the enemy screen, supporting forces, and battle geometry anticipated by a navy. Mount arrangement, target size, fleet support, and intended mission qualify the inference. Secondary armament provides a clue to tactical expectations that must be read with the rest of the design.