Research into improved Swedish heavy batteries also opens access to 18-inch guns in the game. That jump prompts a complaint about the base game's progression through gun calibres. The objection is to how a single research step groups upgrades of different calibres.
Notable Point · 47:05-47:37
Improved heavy batteries and the jump to 18-inch guns
The heavy-battery research ladder prompts criticism when an upgrade also opens access to 18-inch guns.