Ladder Shooting Technology ID
The research ID for Ladder Shooting in Hearts of Iron IV is fire_control_methods_2.
Ladder Shooting
Naval support
Unlock this technology with the research command and the tech ID fire_control_methods_2.
About this technology
Instead of firing over the target and losing track of the impacts behind the enemy ship, shots are deliberately dropped short of the target and the distance between impact and target measured to determine the range.