Artillery Command: Vanguard Increase the Firepower of your Vanguard by 5.0% (15%). Does not stack with the same skill.
Sharpshooter of Londinium (from Retrofit) When this ship fires its Main Gun: 15.0% (30%) chance to deal double DMG with them. When this ship sinks an enemy: increase its Accuracy by 0.5% (1.5%) (can be stacked up to 8 times).
All Out Assault I (II) Activate All Out Assault I : London Class once every 9 (6) times the main gun is fired.