
High carrier screening efficiency further prevents enemy torpedo attacks against the carrier group (stacking diminishingly). Bad positioning applies a penalty to carrier screening efficiency, which may increase the carrier screening ratio required to achieve 100% efficiency. With good positioning, 100% carrier screening efficiency may be reached when the ratio is 1. The ratio of capital ships to carriers and convoys is the carrier screening ratio.

High screening efficiency prevents enemy torpedo attacks against the battle-line and carrier group, and confers increased hit chance (up to +40%) and retreat speed (up to +20%) upon all ships in those groups. With good positioning, 100% screening efficiency may be reached when the ratio is 3 screens per capital ship/carrier.(for example, if you have 4 carriers and 4 battleships, you need 24 screen ships in order to reaching 100% screening efficiency) Bad positioning applies a penalty to screening efficiency, which may increase the screening ratio required to achieve 100% efficiency. The ratio of screen ships and other ships is the screening ratio. If you spot a mistake then you are welcome to fix it. Reference HOI4 Dev Diary - New Naval Combat "Battle-lines" Forum:1133625 Screening efficiency Submarine wolfpack: Consists of submarines, which may threaten the enemy battle-line and carrier group if they are insufficiently screened from torpedoes.If any convoys are present, they will also appear in this area. Carrier group: Consists of carriers which can strike at long range.

Aside from providing heavy firepower, these ships screen the carrier group from torpedoes.
